This isn't new code, this is basically copied verbatim from
//system/bpf/libbpf_android/include/bpf/BpfUtils.h
Test: atest BpfMapTest, TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I80523c9ee0c1e4431f3192eb409ad68c737390a6