libbpf: Use strlcpy() in path resolution fallback logic

Coverity static analyzer complains that strcpy() can cause buffer
overflow. Use libbpf_strlcpy() instead to be 100% sure this doesn't
happen.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220407230446.3980075-1-andrii@kernel.org

tools/lib/bpf/usdt.c

@@ -456,7 +456,7 @@ static int parse_lib_segs(int pid, const char *lib_path, struct elf_seg **segs,
 	if (!realpath(lib_path, path)) {
 		pr_warn("usdt: failed to get absolute path of '%s' (err %d), using path as is...\n",
 			lib_path, -errno);
-		strcpy(path, lib_path);
+		libbpf_strlcpy(path, lib_path, sizeof(path));
 	}
 
 proceed: