integrated optional (experimentl) CLBlast support

CL/cl_ext_intel.h

@@ -0,0 +1,19 @@
+/*******************************************************************************
+ * Copyright (c) 2008-2020 The Khronos Group Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+#include <CL/cl_ext.h>
+#pragma message("The Intel extensions have been moved into cl_ext.h.  Please include cl_ext.h directly.")