grant bpfloader ability to fetch the fd of pinned bpf programs

Fixes:
  W bpfloader: type=1400 audit(0.0:13): avc: denied { read } for name="prog_offload_schedcls_ingress_tether_rawip" dev="bpf" ino=12551 scontext=u:r:bpfloader:s0 tcontext=u:object_r:fs_bpf:s0 tclass=file permissive=0

Test: builds, atest, treehugger
Bug: 150040815
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I3c7b116bc95d2534a3b72f2e3f19c4a2d8ee83f2
2 files changed