[GB#629796] fix gdk/gtkglenumtypes.h.template

(cherry picked from commit b85a5f88d0861955dd05af4e6c7f5abee6f48ab2)
Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>
Use autogen.sh

Follow the common patterns of all autotooled projects.