To dump contents of the last OpenCV error

v_select 'mask' is restricted to these values only: 0 or ~0 (0xff/0xffff/etc)
mask in accuracy test is updated.

* Fix CV_Asserts with negation of strings

{!"string"} causes some compilers to throw a warning.

The value of the string is not that important -- it's only for printing
the assertion message.

Replace these calls with:

  CV_Error(Error::StsError, "string")

to suppress the warning.

* remove unnecessary 'break' after CV_Error()

Error messages are available via exceptions

Reproducer:
    cmake -DCPU_BASELINE=AVX2 -DCV_DISABLE_OPTIMIZATION=ON ...

replaced to safe binary compatible 'rep; nop' asm instruction

- make non-copyable (aligns inner mutex semantic to std::mutex)
- getMemoryPool() returns reference instead of pointer (NULL is not expected here)

* fix #9720

* Add regression test

* Fix calculation method for scale

Fix overflow bugs in conversion from NV12 VA-surface/D3D11texture2D to OpenCL UMat

* Solves #11156

* Check file size for all file format. Disable APPEND if file is empty

* Add test for APPEND mode

To raise errors with proper messages of the problems.

during opencv_world builds

* fixed bug #11100 Integer overflow in kmeans

* fixed integer overflow in other divUp-s in kmeans code
fixed warning about size_t to double conversion

* Haiku supporting patches

* Revert uneeded changes

* Whitespace cleanup

* Fix #10948

* Add test code

* Fixed build error

* Add value zero

* eigen: test cleanup

* SSE2 : use _mm_cvtpd_epi32 when converting from CV_64F to CV_32S

* No need to define a new universal intrinsic