Use bpf_target property for bpf am: 3f91c65681

Original change: https://android-review.googlesource.com/c/platform/external/bcc/+/2945506

Change-Id: If88f0a608e1ac60d3ea323f50ddc7886d86d3a49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>