[gdk-pixbuf] docs: Update list of ignored headers

[Emmanuele Bassi <ebassi src gnome org>]

commit 83ad9db00246cafbb6bcdf861e0438e3e76a36b6
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Apr 30 00:00:31 2018 +0100

    docs: Update list of ignored headers
    
    Like we did for Meson, do this for the Autotools build.

 docs/reference/gdk-pixbuf/Makefile.am |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gdk-pixbuf/Makefile.am b/docs/reference/gdk-pixbuf/Makefile.am
index 652da27..12f3bb3 100644
--- a/docs/reference/gdk-pixbuf/Makefile.am
+++ b/docs/reference/gdk-pixbuf/Makefile.am
@@ -21,12 +21,20 @@ CFILE_GLOB=$(top_srcdir)/gdk-pixbuf/*.c $(top_srcdir)/contrib/gdk-pixbuf-xlib/*.
 # Header files to ignore when scanning
 IGNORE_HFILES=                         \
        pixops                          \
+       gdk-pixbuf.h                    \
        gdk-pixbuf-alias.h              \
+       gdk-pixbuf-autocleanups.h       \
+       gdk-pixbuf-buffer-queue-private.h \
        gdk-pixbuf-marshal.h            \
        gdk-pixbuf-private.h            \
+       gdk-pixbuf-scaled-anim.h        \
        gdk-pixbuf-xlib-private.h       \
-       io-gif-animation.h              \
        io-ani-animation.h              \
+       io-gdip-animation.h             \
+       io-gdip-native.h                \
+       io-gdip-propertytags.h          \
+       io-gdip-utils.h                 \
+       io-gif-animation.h              \
        xpm-color-table.h               \
        test-images.h