deps: bump librdkafka for proper gssapi support

[benesch]

We weren't working hard enough before to statically link in GSSAPI
support. That is now fixed with the latest version of rdkafka, with help
from sasl2-sys and krb5-src. We are rapidly becoming the Rust
authentication experts.

@sploiselle do you still have that Kerberos testing rig lying around? Can you verify that this actually works? So far I've just gotten it to build, which was a nightmare and a half.

---

This change is 

[sploiselle]

This is failing to build for me locally with bin/mzimage build materialized

error: failed to run custom build command for `openssl-sys v0.9.55`

Caused by:
  process didn't exit successfully: `/Users/sean/materialize/materialize/target/debug/build/openssl-sys-22177aeb9b4c6a07/build-script-main` (exit code: 101)
--- stdout
cargo:rustc-cfg=const_fn
cargo:rerun-if-env-changed=X86_64_APPLE_DARWIN_OPENSSL_NO_VENDOR
X86_64_APPLE_DARWIN_OPENSSL_NO_VENDOR unset
cargo:rerun-if-env-changed=OPENSSL_NO_VENDOR
OPENSSL_NO_VENDOR unset
CC_x86_64-apple-darwin = None
CC_x86_64_apple_darwin = None
HOST_CC = None
CC = Some("x86_64-unknown-linux-gnu-cc")
CFLAGS_x86_64-apple-darwin = None
CFLAGS_x86_64_apple_darwin = None
HOST_CFLAGS = None
CFLAGS = Some("-I/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include/x86_64-linux-gnu -isystem/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include")
CRATE_CC_NO_DEFAULTS = None
DEBUG = Some("true")
CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2,sse3,ssse3")
running "perl" "./Configure" "--prefix=/Users/sean/materialize/materialize/target/debug/build/openssl-sys-6b60dede89e688c6/out/openssl-build/install" "no-dso" "no-ssl3" "no-unit-test" "no-comp" "no-zlib" "no-zlib-dynamic" "no-engine" "no-async" "no-shared" "darwin64-x86_64-cc" "-O2" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-I/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include/x86_64-linux-gnu" "-isystem/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include"
Configuring OpenSSL version 1.1.1d (0x1010104fL) for darwin64-x86_64-cc
Using os-specific seed configuration
Creating configdata.pm
Creating Makefile

**********************************************************************
***                                                                ***
***   OpenSSL has been successfully configured                     ***
***                                                                ***
***   If you encounter a problem while building, please open an    ***
***   issue on GitHub <https://github.com/openssl/openssl/issues>  ***
***   and include the output from the following command:           ***
***                                                                ***
***       perl configdata.pm --dump                                ***
***                                                                ***
***   (If you are new to OpenSSL, you might want to consult the    ***
***   'Troubleshooting' section in the INSTALL file first)         ***
***                                                                ***
**********************************************************************
running "make" "depend"
running "make" "build_libs"
perl "-I." -Mconfigdata "util/dofile.pl" \
	    "-oMakefile" crypto/include/internal/bn_conf.h.in > crypto/include/internal/bn_conf.h
perl "-I." -Mconfigdata "util/dofile.pl" \
	    "-oMakefile" crypto/include/internal/dso_conf.h.in > crypto/include/internal/dso_conf.h
perl "-I." -Mconfigdata "util/dofile.pl" \
	    "-oMakefile" include/openssl/opensslconf.h.in > include/openssl/opensslconf.h
/Library/Developer/CommandLineTools/usr/bin/make depend && /Library/Developer/CommandLineTools/usr/bin/make _build_libs
x86_64-unknown-linux-gnu-cc  -I. -Iinclude -fPIC -arch x86_64 -Wa,--noexecstack -I/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include/x86_64-linux-gnu -isystem/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include -O2 -ffunction-sections -fdata-sections -fPIC -g -fno-omit-frame-pointer -m64 -isystem/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DKECCAK1600_ASM -DRC4_ASM -DMD5_ASM -DVPAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DX25519_ASM -DPOLY1305_ASM -DOPENSSLDIR="\"/Users/sean/materialize/materialize/target/debug/build/openssl-sys-6b60dede89e688c6/out/openssl-build/install/ssl\"" -DENGINESDIR="\"/Users/sean/materialize/materialize/target/debug/build/openssl-sys-6b60dede89e688c6/out/openssl-build/install/lib/engines-1.1\"" -D_REENTRANT -DNDEBUG -I/Users/sean/materialize/materialize/target/sysroot/x86_64-unknown-linux-gnu/usr/include/x86_64-linux-gnu -I/usr/local/opt/llvm/include -MMD -MF apps/app_rand.d.tmp -MT apps/app_rand.o -c -o apps/app_rand.o apps/app_rand.c

--- stderr
x86_64-unknown-linux-gnu-cc: error: x86_64: No such file or directory
x86_64-unknown-linux-gnu-cc: error: unrecognized command line option '-arch'; did you mean '-march='?
make[1]: *** [apps/app_rand.o] Error 1
make: *** [build_libs] Error 2
thread 'main' panicked at '


Error building OpenSSL:
    Command: "make" "build_libs"
    Exit status: exit code: 2


    ', /Users/sean/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-src-111.6.1+1.1.1d/src/lib.rs:365:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

However, I was able to get the tag built by CI, which seemed to work! i.e. I'm no longer getting the "No worthy mechs" error message (which was the original issue), which seems to indicate that GSSAPI is now working.

My actual integration test is now failing at a new spot which I haven't taken the time to solve, so I can't definitively say it's working, but the error I'm receiving indicates it's simply a configuration error:

ERROR librdkafka: librdkafka: LIBSASL [thrd:sasl_plaintext://broker:9092/bootstrap]: sasl_plaintext://broker:9092/bootstrap: GSSAPI Error: Unspecified GSS failure.  Minor code may provide more information (Server materialized/broker@TEST.CONFLUENT.IO not found in Kerberos database)

This seems good to merge, mod the fact that it seems to not work with mzimage locally.

[benesch]

I think I've fixed the linking error in CI, so I'm expecting this to finally go green! I'll look into your issue right after lunch, Sean! You're running on macOS, right?

[sploiselle]

Yep, macOS.

[benesch]

Whew, ok, got it working on macOS too. I don't think anyone's tried to cross-compile and statically link libsasl2 in like ten years. @sploiselle if you've still got that machine around, could you retest? I had to change enough things to get cross compilation working that it's possible I broke something.

[benesch]

(If this goes green, though, I'm going to merge, to keep things moving!)