Extra Actions Proto Contains grep-includes.sh as though it were a C++ Header

[cpsauer]

Description of the problem:

The sources_and_headers attribute of the @bazel_tools//src/main/protobuf:extra_actions_base_proto provided to CppCompile and ObjcCompile (mnemonic) actions contains 'external/bazel_tools/tools/cpp/grep-includes.sh'. This feels like it has to be a mistake, since that's an unimplemented tool, not a c-language family file.

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

As in #12852, I think the fastest way to do that would be to grab Kythe's implementation of an extractor (https://github.com/kythe/kythe/blob/master/kythe/cxx/extractor/README.md) and examine the extra_actions_base_proto's sources_and_headers attribute.

What operating system are you running Bazel on?

macOS 11

What's the output of bazel info release?

3.7.2

What's the output of git remote get-url origin ; git rev-parse master ; git rev-parse HEAD ?

This is a private repo for now.

Have you found anything relevant by searching the web?

Yep. Results of learnings above.

[github-actions]

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[github-actions]

This issue has been automatically closed due to inactivity. If you're still interested in pursuing this, please reach out to the triage team (@bazelbuild/triage). Thanks!