* Update to properly find the compiler tools for MSVC 2017

* FindCUDA: Fix the MSVC 2017 compiler tool locations

To use 'z' in Android.mk instead of absolute path from the build machine.

To prevent this result:
    /usr/bin/ccache ccache <android-ndk-r16.1>/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc ...
with:
    ccache: error: Recursive invocation (the name of the ccache binary must be "ccache")

The opencv infrastructure mostly has the basics for supporting avx512 math functions,
but it wasn't hooked up (likely due to lack of users)

In order to compile the DNN functions for AVX512, a few things need to be hooked up
and this patch does that
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

  * disable the warning in CMake, not int the code using pragma

fixes CUDA build

Introduce CMake variable OPENCV_MAP_IMPORTED_CONFIG which controls this behaviour
Added defaults for MSVS targets

CMake message contains this: "Invalid escape sequence \"

fixed native Lapack detection script on Mac/iOS (where native Lapack is a part of Accelerate framework)

'WITH_' variables is intended to enable CMake scripts with some autodetection logic.
'WITH_' can be off, but components is really enabled via command-line options
with proper variables setup (including 'HAVE_').

- 3rdparty/libjasper/jas_getopt.c:129:25: warning: this function declaration is not a prototype [-Wstrict-prototypes]
- clang: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7' [-Wignored-optimization-argument]

rename caffe.proto => opencv-caffe.proto

Allow to specify optimization level via CMake.