Inorder to support VS2019, we add VS2019 config process
in Setup Batch Files,
Because VS2019 and VS2017 could using same vswhere.exe
to detect the InstallationPath,
So we add the -version as the parameter of vswhere
to get the correct VS2017/VS2019's InstallationPath
v3: In BaseTools\set_vsprefix_envs.bat,
move WINSDK10_PREFIX setting into VCToolsInstallDir check condition.