fix clGetKernelWorkGroupInfo built-in kernel fail.

fix clGetKernelWorkGroupInfo built-in kernel fail.

add CL_KERNEL_GLOBAL_WORK_SIZE option for clGetKernelWorkGroupInfo.

v2: should return the max global work size instead of current work size.
This funtion need return CL_INVALID_VALUE if the device is not a custom
device or kernel is not a built-in kernel.
we have 3 kind of built-in kernels for 1d/2d/3d memories, the max global
work size are decided by the dimension and memory type.
the piglit fail is caused by calling NON built-in kernels, so need send
patch to piglit later.

Signed-off-by: Luo Xionghu <xionghu.luo@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>