Fix cargo test. am: e007c37603

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ring/+/2841413

Change-Id: I38034b5c259f03e2f31b4426477c320b08b6f617
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>