Fix non-existent paths being included in globs

[robinlinden]

I hit this after updating to v2.2.0 where the new zig sdk only includes a any-macos-any include folder.

 ERROR: Traceback (most recent call last):
	File "/home/runner/.cache/bazel/_bazel_runner/a9f0723b1e9e47cd91eaa9d5188be59d/external/zig_sdk/BUILD", line 11, column 14, in <toplevel>
		declare_files(
	File "/home/runner/.cache/bazel/_bazel_runner/a9f0723b1e9e47cd91eaa9d5188be59d/external/hermetic_cc_toolchain/toolchain/defs.bzl", line 257, column 36, in declare_files
		all_includes = [native.glob(["lib/{}/**".format(i)]) for i in target_config.includes]
Error in glob: glob pattern 'lib/libc/include/x86_64-macos.11-none/**' didn't match anything, but allow_empty is set to False (the default value of allow_empty can be set with --incompatible_disallow_empty_glob).
ERROR: /home/runner/.cache/bazel/_bazel_runner/a9f0723b1e9e47cd91eaa9d5188be59d/external/zig_sdk/BUILD: no such target '@@zig_sdk//:aarch64-linux-musl_cc': target 'aarch64-linux-musl_cc' not declared in package '' defined by /home/runner/.cache/bazel/_bazel_runner/a9f0723b1e9e47cd91eaa9d5188be59d/external/zig_sdk/BUILD (Tip: use `query "@zig_sdk//:*"` to see all the targets in that package)

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[motiejus]

Nice!

[motiejus]

Thanks!