Reduce socket name length

Some detectors simply ban long abstract sockets

native/jni/init/rootdir.cpp

@@ -24,7 +24,7 @@ static void patch_socket_name(const char *path) {
 	mmap_rw(path, buf, size);
 	for (int i = 0; i < size; ++i) {
 		if (memcmp(buf + i, MAIN_SOCKET, sizeof(MAIN_SOCKET)) == 0) {
-			gen_rand_str(buf + i, sizeof(MAIN_SOCKET));
+			gen_rand_str(buf + i, 16);
 			i += sizeof(MAIN_SOCKET);
 		}
 	}