Set WinSDK version to use current ENV WindowsSDKVersion value when using MSVC

Created by: firodj

I am using Cmake 3.14 with more than one windows sdk availables, eg.: 8.1.x, 10.0.x, ... The generated solution use default to 8.1 (not set), which failed during build. It should be set to 10.x regarding to WindowsSDKVersion ENV variable eg. "10.0.17763.0".

Resource:

• https://stackoverflow.com/questions/45692367/how-to-set-msvc-target-platform-version-with-cmake
• https://gitlab.kitware.com/cmake/cmake/issues/17992