[MERGE #5186 @rajatd] Excluding pre1.js from forceserialized runs
[MERGE #5186 @rajatd] Excluding pre1.js from forceserialized runs

Merge pull request #5186 from rajatd:pre-test

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore