refine test-cl-image.

* use -g option to specify output format.
* add rgba64 to rgba32 in csc module.
* delete unuseless file kernel_csc.cl.
diff --git a/xcore/cl_csc_handler.h b/xcore/cl_csc_handler.h
index 35d730d..fbbdd23 100644
--- a/xcore/cl_csc_handler.h
+++ b/xcore/cl_csc_handler.h
@@ -30,6 +30,7 @@
     CL_CSC_TYPE_NONE = 0,
     CL_CSC_TYPE_RGBATONV12,
     CL_CSC_TYPE_RGBATOLAB,
+    CL_CSC_TYPE_RGBA64TORGBA,
 };
 
 class CLCscImageKernel