tree a27c9c8cf3fe0bbc83b94de2174c374743f0c917
parent e5a485c67fdef607ec0ae9ea37c5a166aac9c4df
author schmitt <schmitt@google.com> 1555601176 -0700
committer Copybara-Service <copybara-worker@google.com> 1555601245 -0700

Make platform options required by all targets.

Platform options are used for toolchain resolution and platform mappings, both of which are required by all targets. Marking them as a universal options fragment.

RELNOTES: None.
PiperOrigin-RevId: 244189499