bpfloader: sleep 20 seconds on failure am: 07b874481f am: 6841c2b102 am: 2c450121a5

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1363957

Change-Id: I5d128373f2a9ed38ee0404781c17918a771fcbb3
tree: d45adc05840e9ce7e3327647612a83ef9c1b9c66
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. NOTICE
  6. OWNERS
  7. PREUPLOAD.cfg