[1.8>master] ARM64: GenerateFastShiftRight used use LDIMM if src is an immediate
[1.8>master] ARM64: GenerateFastShiftRight used use LDIMM if src is an immediate

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