[MERGE #3235 @xiaoyinl] Fix memory leak in AutoSystemInfo::InitPhysicalProcessorCount
[MERGE #3235 @xiaoyinl] Fix memory leak in AutoSystemInfo::InitPhysicalProcessorCount

Merge pull request #3235 from xiaoyinl:memleak_sysinfo

The heap buffer `pBufferStart` is not deleted if `GetLogicalProcessorInformation` fails.

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