message: Remove adding of /usr/bin to compiler paths
  As the underlying Bazel issue bazelbuild/bazel#5634
  is resolved, this code can (and should) go now
  Adding /usr/bin unconditionally does break builds with custom binutils
  installed elsewhere
diff: @@ -1148,18 +1148,7 @@ def _create_local_cuda_repository(repository_ctx):
  host_compiler_prefix = repository_ctx.os.environ[_GCC_HOST_COMPILER_PREFIX].strip()
  cuda_defines["%{host_compiler_prefix}"] = host_compiler_prefix
  - # Bazel sets '-B/usr/bin' flag to workaround build errors on RHEL (see
  - # https://github.com/bazelbuild/bazel/issues/760).
  - # However, this stops our custom clang toolchain from picking the provided
  - # LLD linker, so we're only adding '-B/usr/bin' when using non-downloaded
  - # toolchain.
  - # TODO: when bazel stops adding '-B/usr/bin' by default, remove this
  - # flag from the CROSSTOOL completely (see
  - # https://github.com/bazelbuild/bazel/issues/5634)
  - if should_download_clang:
  cuda_defines["%{linker_bin_path}"] = ""
  - else:
  - cuda_defines["%{linker_bin_path}"] = host_compiler_prefix
  cuda_defines["%{extra_no_canonical_prefixes_flags}"] = ""
  cuda_defines["%{unfiltered_compile_flags}"] = ""
  