CUDA_CUDA_LIBRARY NOTFOUND fix

[Obeyed]

I had an issue while building from the GPU Dockerfile that CUDA_CUDA_LIBRARY was set to NOTFOUND.

There is a pull request that fixes this (#48), however it is not merged into master yet.
I found the solution in opencv/opencv#6577, which was to add
-DCMAKE_LIBRARY_PATH=/usr/local/cuda/lib64/stubs,
to the cmake command while installing OpenCV.

Specific error:

See also "/root/opencv/build/CMakeFiles/CMakeOutput.log".
See also "/root/opencv/build/CMakeFiles/CMakeError.log".
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
CUDA_CUDA_LIBRARY (ADVANCED)
    linked by target "example_gpu_alpha_comp" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_bgfg_segm" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_cascadeclassifier" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_cascadeclassifier_nvidia_api" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_driver_api_multi" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_driver_api_stereo_multi" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_farneback_optical_flow" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_generalized_hough" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_hog" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_houghlines" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_morphology" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_multi" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_opengl" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_optical_flow" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_opticalflow_nvidia_api" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_pyrlk_optical_flow" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_stereo_match" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_stereo_multi" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_super_resolution" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_surf_keypoint_matcher" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_video_reader" in directory /root/opencv/samples/gpu
    linked by target "example_gpu_video_writer" in directory /root/opencv/samples/gpu

The command '/bin/sh -c git clone --depth 1 https://github.com/opencv/opencv.git /root/opencv && 	cd /root/opencv && 	mkdir build && 	cd build && 	cmake -DWITH_QT=ON -DWITH_OPENGL=ON -DFORCE_VTK=ON -DWITH_TBB=ON -DWITH_GDAL=ON -DWITH_XINE=ON -DBUILD_EXAMPLES=ON .. && 	make -j"$(nproc)"  && 	make install && 	ldconfig && 	echo 'ln /dev/null /dev/raw1394' >> ~/.bashrc' returned a non-zero code: 1