Upgrade rustversion to 1.0.12 am: 285a883e3b am: 494112f44c am: 9215c54637 am: eeed96ed55

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rustversion/+/2519956

Change-Id: I9db20d6b42e4531a5483ff3832bc411323e56c3b
Signed-off-by: Automerger Merge Worker <[email protected]>