libxml-2.0: add missing cnames to some Doc fields
libxml-2.0: add missing cnames to some Doc fields

Fixes bug 677354.

GNOME/vala,spidermonkdust/vala,rvu95/vala,jessevdk/vala,jessevdk/vala,spidermonkdust/vala,tjol/vala-tjol,frida/vala,jessevdk/vala,frida/vala,playya/vala,playya/vala,severinh/vala,severinh/vala,Distrotech/vala,flobrosch/vala-fixes,frida/vala,rvu95/vala,spidermonkdust/vala,tjol/vala-tjol,frida/vala,frida/vala,Distrotech/vala,GNOME/vala,GNOME/vala,GNOME/vala,flobrosch/vala-fixes,tjol/vala-tjol,playya/vala,Distrotech/vala,flobrosch/vala-fixes,rvu95/vala,xdave/pvala,severinh/vala