bpfLoader as a lib - make it actually build/work am: 6d4d9d89c2

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/3209890

Change-Id: I5c245a83896357bbcb31210aaa08ba2101a556ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>