[PresentMon] update to <2.1.1>

[cdjzzzz]

Library name

PresentMon

New version number

2.1.1

Other information that may be useful (release notes, etc...)

2.1.1
New Features
Added option to have the GUI capture application launch its own instance of PresentMon Service as a child process (useful for debugging)
Bug Fixes
Fixed issue with duration of CSV frame capture GameTechDev/PresentMon#314
Fixed race condition causing loss of frame data when processing offline ETL files GameTechDev/PresentMon#313
Fixed issue with FrameTime metric calculation GameTechDev/PresentMon#311