Disable ParserSync test for now, it takes waaaaay too long.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 99965d2aebd5ddcaca3e2be1fdcc6f6b4f97702a..80d34066013d43f0c952d9a4353d406f3f797e47 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -1509,7 +1509,9 @@ void TestParserSync(const char* source,
 }
 
 
-TEST(ParserSync) {
+// TODO(marja) This needs to be turned into a fuzzing test, trying all those
+// combinations below takes at least 2 orders of magnitude too long.
+DISABLED_TEST(ParserSync) {
   const char* context_data[][2] = {
     { "", "" },
     { "{", "}" },