[1.7>master] [1.6>1.7] [MERGE #3390 @agarwal-sandeep] Fixes #3387: Fix build break with simd unused variable
[1.7>master] [1.6>1.7] [MERGE #3390 @agarwal-sandeep] Fixes #3387: Fix build break with simd unused variable

Merge pull request #3390 from agarwal-sandeep:issue3387

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