Merge "Soong: libbpf_prog: change output filetype to .bpf" into main am: 9ddba9f7 am: 6850808a

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3348953



Change-Id: Ia1e8ca128b48dfa272e1eecc0a41008fbdc51138
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>