Update llvm (tests broken)

[maxmcd]

I was unable to get the current Dockerfile to buld. clang-5.0 is no longer available in debian:testing.

This dockerfile builds successfully, but it fails the testsuite non-deterministically. Any thoughts on why the tests might be failing?

As an example:

root@88e39bb79e41:/# cloudabi-run -e /usr/x86_64-unknown-cloudabi/bin/cloudlibc-unittests << EOF
%TAG ! tag:nuxi.nl,2015:cloudabi/
---
tmpdir: !file
  path: tmp-unittest
logfile: !fd stdout
EOF
WARNING: Attempting to start executable using emulation.
Keep in mind that this emulation provides no actual sandboxing.
Though this is likely no problem for development and testing
purposes, using this emulator in production is strongly
discouraged.
-> drand48::bounds
-> fdopen::bad
-> localtime_l::santiago
-> fflush::eagain
-> wcsrtombs::ascii_null_ok
-> wmemset::example
-> call_once::example
-> clock_nanosleep::monotonic_relative
-> fread::zero
-> unlinkat::examples
-> uv_ip4_addr::einval
-> wctomb::euro
-> scandirat::even_files
Test failed
--
Statement: ASSERT_EQ(0, mkdirat(state->tmpdir, test->__name))
Expected:           0 ==          0 == (0)
Actual:            -1 == 0xffffffff == (mkdirat(state->tmpdir, test->__name))
Location:  src/libc/testing/testing_execute.c:82
Errno:     20, File exists
Aborted (core dumped)

[EdSchouten]

Hi there,

Thanks for the patch! I've created a separate issue to track the unit testing failure.