Slight modification to example code for FLANN matcher with comment on #3344
Replaced code in .rst file with literalinclude as suggested
Image processing sample for WinRT added.
enable CUDA support for android
fixed CC arch/pts for android (used sm_32)
fixed compilation warnings in .cu files
added `-Xptxas;-dlcm=ca` and `-target-os-variant=Android` to nvcc flags
fixed CUDA_TOOLKIT_TARGET_DIR for android:

use targets/armv7-linux-androideabi is exists
Filter selection and several filters implemented for WinRT sample.
fixed compilation of gpu-basics-similarity tutorial:

initialize TIMES variable with some default value (10)
Some debug options are removed because they are installed by Cmake automatically.

Also forcing -ggdb3 on android leads to debuging issues.
swapped x,y in elbp_
corrected initialization of output_folder in facereco examples
Merge pull request #1894 from asmorkalov:ocv_debug_build
Merge pull request #1884 from asmorkalov:winrt_img_proc_sample
Merge pull request #1898 from berak:b_3349_24
Merge pull request #1897 from berak:b_3393_24
Merge pull request #1797 from moodoki:bugfix_3344
Merge pull request #1887 from jet47:android-cuda-6.0