Make `rustfmt.toml` a symlink

Instead of making a copy of `soong/scripts/rustfmt.toml`, we now
reference it via a symlink. The content is unchanged.

Test: manual
Bug: 229825251
Change-Id: Ia0e833e6bcd97da01715a964b15255014b11ef6f
2 files changed
tree: 72442c74ec408fb0d067fa4732f16e72d6998abd
  1. fuzzing/
  2. gdb/
  3. remote_provisioning/
  4. sanitizer-status/
  5. CleanSpec.mk
  6. OWNERS