Add rules.mk build file for Trusty am: 4356b4a5b8 am: d4d73f021e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/arrayvec/+/2883517

Change-Id: I14ffb4577c6f8ca9282bbcc01234a9896d71d2f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>