[gtk/wip/lantw/build-Fix-out-of-source-make-dist] build: Fix out-of-source make dist

[Ting-Wei Lan <lantw src gnome org>]

commit 56bdcfd7c6f4307f8d935928cca5bb5b48232835
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Sun Aug 30 11:23:05 2020 +0800

    build: Fix out-of-source make dist
    
    These files are generated during the build.

 docs/reference/gtk/Makefile.am | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/docs/reference/gtk/Makefile.am b/docs/reference/gtk/Makefile.am
index c239445b84..520515155c 100644
--- a/docs/reference/gtk/Makefile.am
+++ b/docs/reference/gtk/Makefile.am
@@ -209,15 +209,15 @@ HTML_IMAGES = \
        $(top_srcdir)/gtk/stock-icons/24/edit-find-replace.png          \
        $(top_srcdir)/gtk/stock-icons/24/go-bottom.png                  \
        $(top_srcdir)/gtk/stock-icons/24/go-first-ltr.png               \
-       $(top_srcdir)/gtk/stock-icons/24/go-first-rtl.png               \
+       $(top_builddir)/gtk/stock-icons/24/go-first-rtl.png             \
        $(top_srcdir)/gtk/stock-icons/24/go-last-ltr.png                \
-       $(top_srcdir)/gtk/stock-icons/24/go-last-rtl.png                \
+       $(top_builddir)/gtk/stock-icons/24/go-last-rtl.png              \
        $(top_srcdir)/gtk/stock-icons/24/go-top.png                     \
        $(top_srcdir)/gtk/stock-icons/24/go-previous-ltr.png            \
-       $(top_srcdir)/gtk/stock-icons/24/go-previous-rtl.png            \
+       $(top_builddir)/gtk/stock-icons/24/go-previous-rtl.png          \
        $(top_srcdir)/gtk/stock-icons/24/go-down.png                    \
        $(top_srcdir)/gtk/stock-icons/24/go-next-ltr.png                \
-       $(top_srcdir)/gtk/stock-icons/24/go-next-rtl.png                \
+       $(top_builddir)/gtk/stock-icons/24/go-next-rtl.png              \
        $(top_srcdir)/gtk/stock-icons/24/go-up.png                      \
        $(top_srcdir)/gtk/stock-icons/24/drive-harddisk.png             \
        $(top_srcdir)/gtk/stock-icons/24/network-idle.png               \
@@ -261,7 +261,7 @@ HTML_IMAGES = \
        $(top_srcdir)/gtk/stock-icons/24/document-revert-ltr.png        \
        $(top_srcdir)/gtk/stock-icons/24/document-revert-rtl.png        \
        $(top_srcdir)/gtk/stock-icons/24/media-floppy.png               \
-       $(top_srcdir)/gtk/stock-icons/24/document-save.png              \
+       $(top_builddir)/gtk/stock-icons/24/document-save.png            \
        $(top_srcdir)/gtk/stock-icons/24/document-save-as.png           \
        $(top_srcdir)/gtk/stock-icons/24/edit-select-all.png            \
        $(top_srcdir)/gtk/stock-icons/24/gtk-select-color.png           \
@@ -283,17 +283,17 @@ HTML_IMAGES = \
        $(top_srcdir)/gtk/stock-icons/24/zoom-in.png                    \
        $(top_srcdir)/gtk/stock-icons/24/zoom-out.png                   \
        $(top_srcdir)/gtk/stock-icons/24/media-seek-forward-ltr.png     \
-       $(top_srcdir)/gtk/stock-icons/24/media-seek-forward-rtl.png     \
+       $(top_builddir)/gtk/stock-icons/24/media-seek-forward-rtl.png   \
        $(top_srcdir)/gtk/stock-icons/24/media-skip-forward-ltr.png     \
-       $(top_srcdir)/gtk/stock-icons/24/media-skip-forward-rtl.png     \
+       $(top_builddir)/gtk/stock-icons/24/media-skip-forward-rtl.png   \
        $(top_srcdir)/gtk/stock-icons/24/media-playback-pause.png       \
        $(top_srcdir)/gtk/stock-icons/24/media-playback-start-ltr.png   \
        $(top_srcdir)/gtk/stock-icons/24/media-playback-start-rtl.png   \
        $(top_srcdir)/gtk/stock-icons/24/media-seek-backward-ltr.png    \
-       $(top_srcdir)/gtk/stock-icons/24/media-seek-backward-rtl.png    \
+       $(top_builddir)/gtk/stock-icons/24/media-seek-backward-rtl.png  \
        $(top_srcdir)/gtk/stock-icons/24/media-record.png               \
        $(top_srcdir)/gtk/stock-icons/24/media-skip-backward-ltr.png    \
-       $(top_srcdir)/gtk/stock-icons/24/media-skip-backward-rtl.png    \
+       $(top_builddir)/gtk/stock-icons/24/media-skip-backward-rtl.png  \
        $(top_srcdir)/gtk/stock-icons/24/media-playback-stop.png        \
        $(top_srcdir)/gtk/stock-icons/24/view-fullscreen.png            \
        $(top_srcdir)/gtk/stock-icons/24/view-restore.png               \