Appveyor: disable Radient build

Author: TheMostDiligent

appveyor.yml

@@ -41,7 +41,7 @@ before_build:
   - echo add_subdirectory(DiligentFX) >> CMakeLists.txt
   - echo add_subdirectory(DiligentSamples) >> CMakeLists.txt
   - echo %PLATFORM%
-  - cmake -S . -B ./build -D DILIGENT_MSVC_COMPILE_OPTIONS="/WX" -D DILIGENT_MSVC_RELEASE_COMPILE_OPTIONS="/arch:AVX2" -D CMAKE_SYSTEM_VERSION=10.0.19041.0 -G "Visual Studio 16 2019" -A %PLATFORM%
+  - cmake -S . -B ./build -D DILIGENT_MSVC_COMPILE_OPTIONS="/WX" -D DILIGENT_MSVC_RELEASE_COMPILE_OPTIONS="/arch:AVX2" -D CMAKE_SYSTEM_VERSION=10.0.19041.0 -D DILIGENT_NO_RADIENT=ON -G "Visual Studio 16 2019" -A %PLATFORM%
   - nuget restore c:\projects\build\DiligentSamples_Test.sln
 
 build: