move libbpf_android into loader subdirectory am: 5c412c6c0e am: 468c1ee422

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/2995652

Change-Id: Ia83381268d22eb1a997b4c8ec21fb8885c7d276b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
tree: d74e056e3aec7b93feddbd7d081533d84207507a
  1. loader/
  2. progs/
  3. Android.bp
  4. NOTICE
  5. OWNERS
  6. OWNERS_bpf
  7. PREUPLOAD.cfg
  8. TEST_MAPPING