libempathy-gtk/libempathy-gtk.pc.in: fix name of the library
libempathy-gtk/libempathy-gtk.pc.in: fix name of the library

svn path=/trunk/; revision=674

GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets