* implement GSWndEGL copy/pasted from zzogl.
* remove linux debugging shader that failed to compile on window
* add additional debug message during context creation
git-svn-id: http://pcsx2.googlecode.com/svn/branches/gsdx-ogl-wnd@5520 96395faa-99c1-11dd-bbfe-3dabce05a288
gregory.hainaut