libbpf_legacy.h not ISO C compatible

[ripatel-fd]

When compiling with -Werror=pedantic:

./opt/include/bpf/libbpf_legacy.h:33:22: error: ISO C restricts enumerator values to range of ‘int’ [-Werror=pedantic]
  LIBBPF_STRICT_ALL = 0xffffffff,

caused by

libbpf/src/libbpf_legacy.h

Line 33 in b5e9722

LIBBPF_STRICT_ALL = 0xffffffff,

should be

-  LIBBPF_STRICT_ALL = 0xffffffff,
+  LIBBPF_STRICT_ALL = -1,

[anakryiko]

I think it's better to remove highest bit and keep it look like unsigned (0x7fffffff). Are you intending to send a patch upstream to bpf@vger.kernel.org, or should I send a quick one?

[ripatel-fd]

@anakryiko If you don't mind, I'll send up a patch tomorrow. About time to get my email client ready and send my first patch to Linux :)