KVER macro - support 4.9.256+ kernel am: 30af4b5487 am: c90cd5a93e

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1584754

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I704b65bdf6d54b07f2105357dd8c5e116bc3efbd
tree: 39e3e9230a126c9ca833e93d7d25e52219306959
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. NOTICE
  6. OWNERS
  7. PREUPLOAD.cfg