cmake HAVE_WINRT_SDK examples

plumonito/dtslam 3rdparty/opencv-git/cmake/OpenCVCRTLinkage.cmake :29 

try_compile(HAVE_WINRT_SDK
  "${OpenCV_BINARY_DIR}"
  "${OpenCV_SOURCE_DIR}/cmake/checks/winrttest.cpp")

plumonito/dtslam 3rdparty/opencv-git/cmake/OpenCVCRTLinkage.cmake :36 

elseif(ENABLE_WINRT_MODE_NATIVE AND HAVE_WINRT_SDK AND HAVE_MSVC2012 AND HAVE_MSPDK)