[MERGE #4177 @sigatrev] ARM64: fix GenerateAuxSlotAdjustmentRequiredCheck
[MERGE #4177 @sigatrev] ARM64: fix GenerateAuxSlotAdjustmentRequiredCheck

Merge pull request #4177 from sigatrev:shiftBranch

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