libhfuzz/memorycmp: add declarations for __builtin_str(n)cmp
__attribute__((visibility("default"))) __attribute__((used))
const char* const LIBHFUZZ_module_memorycmp = "LIBHFUZZ_module_memorycmp";
+extern size_t __builtin_strlen(const char *s);
+extern size_t __builtin_strnlen(const char *s, size_t maxlen);
+
static inline int HF_strcmp(const char* s1, const char* s2, uintptr_t addr) {
size_t i;
for (i = 0; s1[i] == s2[i]; i++) {
