Uniquify generated source filenames am: 185460b997 am: efeff42250 am: ed5af8bd00

Original change: https://android-review.googlesource.com/c/platform/external/wayland/+/2464373

Change-Id: Iea152af34ad8d5bb5caecf293c3a54e761cb1144
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>