Copy rules.mk files from external/rust/crates.

Bug: 339424309
Test: treehugger
Change-Id: I86571127cca620cb6e5335e9583721897547a3f0
28 files changed
tree: 1b4a2251e5bed07accec6d844c59c3fbeef1fb3d
  1. crates/
  2. pseudo_crate/
  3. .gitignore
  4. METADATA
  5. OWNERS
  6. PREUPLOAD.cfg