Fixing buildbot job:

- explicitly turning OCL off since WinRT does not support it
 - fixing macro definitions in core/ocl.cpp

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

modules/core/src/ocl.cpp

@@ -2198,7 +2198,6 @@ inline cl_int getStringInfo(Functor f, ObjectType obj, cl_uint name, std::string
     return CL_SUCCESS;
 }
 
-#ifdef HAVE_OPENCL
 static void split(const std::string &s, char delim, std::vector<std::string> &elems)
 {
     elems.clear();
@@ -2239,7 +2238,6 @@ static bool parseOpenCLDeviceConfiguration(const std::string& configurationStr,
     }
     return true;
 }
-#endif
 
 #ifdef WINRT
 static cl_device_id selectOpenCLDevice()