x11-client: Implementation of brush style "BS_HATCHED"

The brush style "BS_HATCHED" is currently missing. This leads to unexpected behaviour if an application (in my case it Paint Shop Pro 7.0) is using this brush style, because the part which should get filled using this brush style is not updated at all.

I referenced [MS-RDPEGDI] 2.2.2.2.1.1.2.3 PatBlt (PATBLT_ORDER) for the patterns.

Should this get copied over to libfreerdp-gdi?

Please review.

P.S. This is my first GitHub experience, I hope I did okay :)