[bazel_sdk] Initialize @host_platforms.

Add @platforms as a submodule and initialize @host_platforms from it.

This is needed for https://fxrev.dev/1118616 to land.

Bug: 364326159
Change-Id: I275f303db162c02893391c17caa601af3bb451f5
Reviewed-on: https://fuchsia-review.googlesource.com/c/boards/emac/+/1120636
Commit-Queue: Darren Chan <chandarren@google.com>
Reviewed-by: Jiaming Li <lijiaming@google.com>
4 files changed
tree: ff5f43325fa68cc43923c3eec84f0ac10afabb90
  1. boards/
  2. manifests/
  3. platform/
  4. products/
  5. scripts/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitignore
  10. .gitmodules
  11. AUTHORS
  12. BUILD.bazel
  13. CONTRIBUTING.md
  14. LICENSE
  15. OWNERS
  16. PATENTS
  17. README.md
  18. rollers.textproto
  19. shac.star
  20. shac.textproto
  21. WORKSPACE.bazel
README.md

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