Insert ocl_common_defines to the cl source file.

Insert ocl_common_defines to the cl source file.

Remove the duplicate definitions in the ocl_stdlib.h. As we
may need to refer these two macros, we put it to the ocl_common_defins.h
which could be included by host application.
The two macros are as below:

Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Reviewed-by: Lu Guanqun <guanqun.lu@intel.com>