eliminate all the warnings on win32 and win64

add a new function abssum
fix the bug of test and perf because someone remove non-free module from cmakelist.txt

modules/ocl/src/columnsum.cpp

@@ -88,7 +88,7 @@ void cv::ocl::columnSum(const oclMat &src, oclMat &dst)
     args.push_back( make_pair( sizeof(cl_int), (void *)&dst.step));
 
     size_t globalThreads[3] = {dst.cols, 1, 1};
-    size_t localThreads[3]  = {16, 16, 1};
+    size_t localThreads[3]  = {256, 1, 1};
 
     openCLExecuteKernel(clCxt, &imgproc_columnsum, kernelName, globalThreads, localThreads, args, src.channels(), src.depth());