opengl32: Perform cAccumBits filtering if specified in wglChoosePixelFormat().
On Windows, if wglChoosePixelFormat specifies cAccumBits, the best matching PIXELFORMATDESCRIPTOR obtained should contain AccumBits information. Some industrial software, such as CAD applications, require matching the AccumBits information.
Signed-off-by: chenjiangyi chenjiangyi@uniontech.com

