fuzzers: ignore size limits when compiled standalone

This way we can still call fuzzers on old samples, but oss-fuzz will not waste
its and our time finding overly large inputs.

src/network/fuzz-netdev-parser.c

@@ -11,7 +11,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_(unlink_tempfilep) char netdev_config[] = "/tmp/fuzz-networkd.XXXXXX";
 
-        if (size > 65536)
+        if (outside_size_range(size, 0, 65536))
                 return 0;
 
         if (!getenv("SYSTEMD_LOG_LEVEL"))