BpfLoader: adjust for change to bpf_map_def.h location am: 1b44455113 am: 5c4a76eb56

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/3236279

Change-Id: I754025cd7ff41d8ecf6e179f6bd13ec5f65fc678
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>