docs: Documentation fixes

Let's see if we can get a 100% coverage for Clutter too.

doc/reference/clutter/Makefile.am

@@ -80,8 +80,6 @@ IGNORE_HFILES=\
 	clutter-script-private.h 	\
 	clutter-stage-window.h 		\
 	clutter-timeout-interval.h 	\
-	stamp-clutter-enum-types.h 	\
-	stamp-clutter-marshal.h 	\
 	cogl 				\
 	eglnative 			\
 	eglx 				\
@@ -90,8 +88,6 @@ IGNORE_HFILES=\
 	osx 				\
 	x11 				\
 	json 				\
-	pango 				\
-	sdl 				\
 	win32
 
 EXTRA_HFILES=\

doc/reference/clutter/clutter-sections.txt

@@ -1147,8 +1147,6 @@ clutter_x11_add_filter
 clutter_x11_remove_filter
 
 <SUBSECTION>
-ClutterX11XInputDevice
-ClutterX11XInputEventTypes
 clutter_x11_get_input_devices
 clutter_x11_has_xinput
 clutter_x11_enable_xinput
@@ -1176,6 +1174,8 @@ clutter_x11_texture_pixmap_get_type
 
 <SUBSECTION Private>
 ClutterX11TexturePixmapPrivate
+ClutterX11XInputDevice
+ClutterX11XInputEventTypes
 </SECTION>
 
 <SECTION>