remove redundant OPENCL_DIR flag

remove as much warnings as possible
use enum instead of MACRO for ocl.hpp
add command line parser in accuracy test and perf test
some bug fix for arthim functions

modules/ocl/test/precomp.hpp

@@ -67,7 +67,5 @@
 #include "interpolation.hpp"
 //#include "add_test_info.h"
 
-#define OPENCV_DEFAULT_OPENCL_DEVICE CVCL_DEVICE_TYPE_GPU
-
 #endif