rename BPF_FD_TO_INT() macro to BPF_FD_TO_U32() am: 38fb4300fb

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1514873

Change-Id: I3c4f2d978724eda11659b7d71238dfaa6c0d5350
tree: 65cb94644bfa1c08e315276848cf13ebfdb38df1
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. NOTICE
  6. OWNERS
  7. PREUPLOAD.cfg