skel2: Add Rust staticlib dependency am: 99496dd866

Original change: https://android-review.googlesource.com/c/trusty/app/sample/+/2985576

Change-Id: I1aa3f0c68a93d2db76cd3bce26415bc8f79aea24
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>