Adding METADATA file to libdrm am: 31b8ae69d9 am: ed0a0cde4e

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

Change-Id: I1e52b3bd10e01337dbded9209bd4c79a4b206fda
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>