Fix edge cases of legacy crosstool migrator

https://github.com/bazelbuild/bazel/issues/5883

RELNOTES: None.
PiperOrigin-RevId: 227688115
3 files changed
tree: 8ad966b5634ff7b7145ef56ba08da160f79fd203
  1. third_party/
  2. tools/
  3. BUILD
  4. LICENSE