Improve package descriptions.
Improve package descriptions.

stapelberg/libxcb,OpenInkpot-archive/iplinux-libxcb,topcat/xcb-win32,topcat/xcb-win32,topcat/xcb-win32,topcat/xcb-win32,OpenInkpot-archive/iplinux-libxcb,topcat/xcb-win32,stapelberg/libxcb,OpenInkpot-archive/iplinux-libxcb,stapelberg/libxcb