taken from https://github.com/google/googletest/pull/856

fix for opencv/opencv#8105, compilation issue with mingw32 (in
google/googletest#721 a similar issue was solved and the reason was
described as MinGW defines _CRITICAL_SECTION and _RTL_CRITICAL_SECTION
as two separate (equivalent) structs, instead of using typedef)

(2.4) Backports from master branch (#7854)

* restore Google Test 1.7.0 (get patch)

* ts: update Google Test to 1.8.0 release

https://github.com/google/googletest

* ts: re-apply OpenCV patch for gtest

* ts: fixes for gtest 1.8.0

* ts: workaround MSVS2015 problem in gtest

2. fixed parsing of "cat[range_spec]ord[range_spec]" type specification string when using ml::TrainData::loadFromCSV(). Thanks to A. Kaehler for reporting it

Fix for bug #5007: moved definition of Size_MatDepth_t and Size_MatDepth from ts_perf.hpp to perf_channels.cpp. This way they are closer to where they are needed and live in a different namespace (possibly the reason why the fix works).

- Substituted HAVE_WINRT with WINRT
- Fixed compilation issues in ocl.cpp and parallel.cpp
- Fixed compiler issue for WP8: "C2678: binary '+' : no operator found which takes a left-hand - Fixed gitignore
- Added #ifdef HAVE_OPENCL to remove compiler warnings in ocl.cpp
- Used NO_GETENV similar to '3rdparty\libjpeg\jmemmgr.c;
- Added ole32.lib for core module (for WindowsStore 8.0 builds)
- Made OpenCV_ARCH aware of ARM
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

use CV_CUDA_TEST_MAIN for opencv_test_core to initialize CUDA
device information

IPP can be switched on and off on runtime;

Optional implementation collector was added (switched off by default in CMake). Gathers data of implementation used in functions and report this info through performance TS;

TS modifications for implementations control;

Added OCL performance test for YUV2RGB_IYUV, YUV2GRAY_420, RGB2YUV_IYUV, YUV2RGB_YUY2, YUV2GRAY_YUY2 color conversion modes