Update libuv

libs/libuv/test/run-tests.c

@@ -56,6 +56,7 @@ int main(int argc, char **argv) {
   case 1: return run_tests(0);
   case 2: return maybe_run_test(argc, argv);
   case 3: return run_test_part(argv[1], argv[2]);
+  case 4: return maybe_run_test(argc, argv);
   default:
     fprintf(stderr, "Too many arguments.\n");
     fflush(stderr);
@@ -177,5 +178,17 @@ static int maybe_run_test(int argc, char **argv) {
     return spawn_stdin_stdout();
   }
 
+#ifndef _WIN32
+  if (strcmp(argv[1], "spawn_helper_setuid_setgid") == 0) {
+    uv_uid_t uid = atoi(argv[2]);
+    uv_gid_t gid = atoi(argv[3]);
+
+    ASSERT(uid == getuid());
+    ASSERT(gid == getgid());
+
+    return 1;
+  }
+#endif  /* !_WIN32 */
+
   return run_test(argv[1], 0, 1);
 }