glib-2.0: Rename DataTestFunc to TestDataFunc
glib-2.0: Rename DataTestFunc to TestDataFunc

Fixes bug 645178.

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