[polari/wip/ozinger: 10/18] Update .gitlab-ci.yml

[Florian Müllner <fmuellner src gnome org>]

commit f497defd047e3d5d8d3229e2220a7520f5db7789
Author: DaeHyun Sung <sungdh86 gmail com>
Date:   Wed Mar 7 17:35:32 2018 +0000

    Update .gitlab-ci.yml

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8b73404..57cffb3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,6 +4,7 @@ stages:
  - build
 
 before_script:
+  - dnf clean packages
   - dnf install -y gcc meson redhat-rpm-config gettext itstool gtk3-devel
                    gjs-devel gobject-introspection-devel telepathy-glib-devel
                    libappstream-glib desktop-file-utils