libbpf: fix extraversion in makefile to that of upstream

Backport in f49907472f00 ("sync: latest libbpf changes from kernel")
missed to bump Makefile's EXTRAVERSION to 3.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
1 file changed
tree: 207f04c6eb20de1580b7f029e38b6710c208b179
  1. include/
  2. scripts/
  3. src/
  4. CHECKPOINT-COMMIT
  5. README