Adding METADATA file to libdrm am: 31b8ae69d9 am: ed0a0cde4e am: ac21f6e34c am: b37494c0d9 am: ae94747d9c

Original change: https://android-review.googlesource.com/c/platform/external/libdrm/+/2441386

Change-Id: Ia7db00c0d476e44ca93472dfcd4a00a9347dbf1e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>