closed #3853: Some JSB projects(TestJavascript, WatermelonWithMe) crash in DEBUG mode on iOS platform. Don’t define `DEBUG` macro in our projects since all third party libraries(e.g. Spidermonkey) were built in RELEASE mode.
Merge pull request #5225 from dumganhar/iss3853-jsb-crash-debug-mode

closed #3853: Some JSB projects(TestJavascript, WatermelonWithMe) crash in DEBUG mode on iOS platform.