MicroBuild v2: Fix logic in run_build.ps1 to correctly use the provided value of $binpath if it is provided.
MicroBuild v2: Fix logic in run_build.ps1 to correctly use the provided value of $binpath if it is provided.

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