Bump XLA to 0.2.0

[jonatanklosko]

Closes #217.

[zacky1972]

I met the following error:

ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:101:20: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:101:29: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:102:20: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:102:29: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:104:19: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD:106:23: invalid escape sequence: \/. You can enable unknown escape sequences by passing the flag --incompatible_restrict_string_escapes=false
ERROR: Skipping '//tensorflow/compiler/xla/extension:xla_extension': no such target '//tensorflow/compiler/xla/extension:xla_extension': target 'xla_extension' not declared in package 'tensorflow/compiler/xla/extension' defined by /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD
WARNING: Target pattern parsing failed.
ERROR: no such target '//tensorflow/compiler/xla/extension:xla_extension': target 'xla_extension' not declared in package 'tensorflow/compiler/xla/extension' defined by /Users/zacky/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD
INFO: Elapsed time: 0.092s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)
make: *** [/Users/zacky/github/nx_nif/deps/xla/cache/build/xla_extension-aarch64-darwin-cpu.tar.gz] Error 1

I can fix it temporally by the modification $HOME/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD as follows:

diff ~/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD ~/.cache/xla_extension/tf-54dee6dd8d47b6e597f4d3f85b6fb43fd5f50f82/tensorflow/compiler/xla/extension/BUILD.bak
101,102c101,102
<       d="$${d/llvm\\/include\\/llvm/llvm}"
<       d="$${d/llvm\\/include\\/llvm-c/llvm-c}"
---
>       d="$${d/llvm\/include\/llvm/llvm}"
>       d="$${d/llvm\/include\/llvm-c/llvm-c}"
104c104
<       d="$${d/src\\/google/google}"
---
>       d="$${d/src\/google/google}"
106c106
<       d="$${d/include\\/grpc/grpc}"
---
>       d="$${d/include\/grpc/grpc}"

Then I met the following error:

ERROR: /private/var/tmp/_bazel_zacky/28edfec9fbf3ed3b1fb5d31e37f4bf1d/external/local_config_cc/BUILD:48:19: in cc_toolchain_suite rule @local_config_cc//:toolchain: cc_toolchain_suite '@local_config_cc//:toolchain' does not contain a toolchain for cpu 'darwin_arm64'
ERROR: Analysis of target '//tensorflow/compiler/xla/extension:xla_extension' failed; build aborted: Analysis of target '@local_config_cc//:toolchain' failed
INFO: Elapsed time: 3.955s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (70 packages loaded, 355 targets configured)
FAILED: Build did NOT complete successfully (70 packages loaded, 355 targets configured)
make: *** [/Users/zacky/github/nx_nif/deps/xla/cache/build/xla_extension-aarch64-darwin-cpu.tar.gz] Error 1

I fix it temporally as follows:

% diff /private/var/tmp/_bazel_zacky/28edfec9fbf3ed3b1fb5d31e37f4bf1d/external/local_config_cc/BUILD /private/var/tmp/_bazel_zacky/28edfec9fbf3ed3b1fb5d31e37f4bf1d/external/local_config_cc/BUILD.bak 
55d54
<         "darwin_arm64": ":cc-compiler-darwin",

Then I met the following error:

ERROR: While resolving toolchains for target //tensorflow/tools/git:gen_git_source: No matching toolchains found for types @bazel_tools//tools/cpp:toolchain_type. Maybe --incompatible_use_cc_configure_from_rules_cc has been flipped and there is no default C++ toolchain added in the WORKSPACE file? See https://github.com/bazelbuild/bazel/issues/10134 for details and migration instructions.
ERROR: Analysis of target '//tensorflow/compiler/xla/extension:xla_extension' failed; build aborted: No matching toolchains found for types @bazel_tools//tools/cpp:toolchain_type. Maybe --incompatible_use_cc_configure_from_rules_cc has been flipped and there is no default C++ toolchain added in the WORKSPACE file? See https://github.com/bazelbuild/bazel/issues/10134 for details and migration instructions.

[zacky1972]

Above mentioned errors seem to be fixed by updating EXLA.