T-API: cv::transpose

**Description:**
* changed memory pattern for local memory, unrolled cycles
* increased number of rows per work-item for Intel, changed localsize

**Performance report:**
http://ocl.itseez.com/intel/export/perf/pr/2906/report/

check_regression=*OCL*Transpose*
test_filter=*OCL*Transpose*
test_modules=core
build_examples=OFF
`const` ?