Build fails with -Werror=discarded-qualifiers in libbpf.c

[loverhacking]

When building libbpf-bootstrap/examples/c, the build fails while compiling the bootstrap libbpf used by bpftool.

The error is:

libbpf.c: In function ‘resolve_full_path’:
libbpf.c:11359:35: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
11359 | next_path = strchr(s, ':');
| ^
At top level:
cc1: note: unrecognized command-line option ‘-Wno-unknown-warning-option’ may have been intended to silence earlier diagnostics
cc1: all warnings being treated as errors

The issue appears to be caused by assigning the result of strchr(s, ':') where s is const char *, to a non-const pointer char *next_path;

Changing it to: const char *next_path fixes this compilation error in my environment.