Merge "Move b from a shell function to a shell script at build/bazel/bin/b"...

Merge "Move b from a shell function to a shell script at build/bazel/bin/b" am: 5319beb7 am: 4b9dbe8f am: e43d7306

Original change: https://android-review.googlesource.com/c/platform/build/+/2266399



Change-Id: I161da325763412caf241300997cfdc6916c956bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>