[MERGE #1085] cross-platform: Enable compiler optimization for non debug builds
[MERGE #1085] cross-platform: Enable compiler optimization for non debug builds

Merge pull request #1085 from obastemur:enable_linkopt

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