xplat: add eh frame data to thunks
xplat: add eh frame data to thunks

DeferredParsingThunk asm didn't have eh frame data. If an exception is
thrown during its execution (calling JavascriptFunction::DeferredParse),
process will crash because it cannot unwind the stack correctly.

Changed to use asm macroes which adds cfi directives. Applied the same
fix to DeferredDeserializeThunk.

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