[introspection] Add missing annotations to GDataDocumentsEntry
[introspection] Add missing annotations to GDataDocumentsEntry

pwithnall/libgdata,Pecisk/libgdata,Distrotech/libgdata,pwithnall/libgdata,Pecisk/libgdata,Distrotech/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata-gtasks,GNOME/libgdata,Pecisk/libgdata,Pecisk/libgdata-gtasks,Distrotech/libgdata