[msitools: 4/5] .gitlab-ci: add diffutils

[Marc-André Lureau <malureau src gnome org>]

commit f459e2ae3e43f74002efca69dbe6fc1ce51449f6
Author: Marc-André Lureau <marcandre lureau redhat com>
Date:   Tue Aug 6 16:32:02 2019 +0400

    .gitlab-ci: add diffutils

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2980830..67497be 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,6 +8,7 @@ variables:
                 redhat-rpm-config
                 bison bison-devel bison-runtime
                 perl-XML-XPath
+                diffutils
                 mingw32-adwaita-icon-theme
                 mingw64-adwaita-icon-theme
                 mingw32-atk