Also, the androi-opencv.mk.in wasn't correct for one of the crystax NDK
build directory setups

minor refactoring of GPU module and GPU tests, split arithm and imgproc parts.

mainly cmake stuff, but in persistance the wcstombs
is not supported on android, and in
sift.cpp there was and ifdef that affected arm and this
causes undefined symbols on android.

Basically just adding lines at top of CMakeLists that alter behavior if ANDROID is set to
true.

adding cmake based android scripts and a reusable android library - samples to follow - haven't tested yet completely

added gpu compare version for CMP_NE operation

added npp_error function
added check_and_treat_gpu_exception function for tests_gpu

renamed createDetector to createFeatureDetector

Added implementation and test for the GPU version of warpAffine, warpPerspective, rotate, based on NPP.
Renamed copyConstBorder to copyMakeBorder.
Fixed warnings when HAVE_CUDA is not defined.

Added implementation and test for the GPU version of flip, resize, sum, minMax, copyConstBorder, setTo, based on NPP.