Uniquify generated source filenames am: 185460b997 am: efeff42250 am: ed5af8bd00 am: fc164bae43

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

Change-Id: Ib0bf7465837744a6c3399297216be540a8b15057
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>