GPU OpenCL: Improve device detection and do not consider platforms/devices, which do not support SPIR-V

Author: davidrohr

GPU/GPUTracking/Base/opencl/CMakeLists.txt

@@ -106,4 +106,4 @@ endif()
 if(OPENCL_ENABLED_SPIRV)
   target_compile_definitions(${targetName} PRIVATE OPENCL_ENABLED_SPIRV)
 endif()
-target_compile_definitions(${targetName} PRIVATE OCL_FLAGS=$<JOIN:${OCL_FLAGS},\ >)
+target_compile_definitions(${targetName} PRIVATE GPUCA_OCL_BUILD_FLAGS=$<JOIN:${OCL_FLAGS},\ >)