[gtksourceview] Fix make distcheck

[Sébastien Wilmet <swilmet src gnome org>]

commit ce1be088e0b8617d6afcf1c24c33427a43fe219c
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Apr 14 22:09:34 2014 +0200

    Fix make distcheck

 tests/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 94dd3f3..b437759 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -175,6 +175,8 @@ EXTRA_DIST =                                \
        test-completion.ui              \
        test-search.gresource.xml       \
        test-search.ui                  \
+       test-widget.gresource.xml       \
+       test-widget.ui                  \
        $(python_tests)
 
 if INSTALLED_TESTS