X11 and libfreerdp-gdi: Added brush style BS_HATCHED

Sorry to start a new pull request, but since the first pull request I started was from my master branch and could not easy merged back into upstream, I rebuild my patch in this branch.

The implementation for the X11 client is fully working IMHO.

The wrong background colour for the software gdi implementation for 16 and 8 bit colour depth is still a issue (left 16bit; right 8bit: http://postimage.org/image/5okbc7du9/).