[gtk+] HighContrast: Fix make dist

[Rico Tzschichholz <ricotz src gnome org>]

commit 83fc4d591a918d1bafa1cb12f89ac0044a9e0d91
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Jan 6 15:17:52 2016 +0100

    HighContrast: Fix make dist

 gtk/Makefile.am |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 7b8ac9c..c851656 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -1279,9 +1279,13 @@ theme_sources =                          \
        theme/HighContrast/_colors.scss         \
        theme/HighContrast/_common.scss         \
        theme/HighContrast/_drawing.scss        \
+       theme/HighContrast/gtk-contained-dark.scss \
+       theme/HighContrast/gtk-contained.scss   \
        theme/HighContrast/Gemfile              \
+       theme/HighContrast/gtk-contained.css    \
+       theme/HighContrast/gtk-contained-dark.css \
        theme/HighContrast/gtk.css              \
-       theme/HighContrast/gtk.scss             \
+       theme/HighContrast/gtk-dark.css         \
        theme/HighContrast/parse-sass.sh        \
        theme/Raleigh/gtk-default.css