[gnome-calculator] Use non-interactive frontend to avoid tzdata ubuntu install hang

[Robert Roth <robertroth src gnome org>]

commit 3e0d156280f72aefd79a2f5021a04759cc4555f0
Author: Robert Roth <robert roth off gmail com>
Date:   Thu Jun 4 13:38:24 2020 +0300

    Use non-interactive frontend to avoid tzdata ubuntu install hang

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 691807ae..17c105ae 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
   image: ubuntu:rolling
   before_script:
     - apt-get update
-    - apt-get install -q -y --no-install-recommends valac gcc gettext itstool libgtk-3-dev libgtk-3-bin 
libgtksourceview-4-dev libmpc-dev libmpfr-dev libsoup2.4-dev libxml2-dev libgee-0.8-dev libvala-0.48 
python3-pip ninja-build
+    - DEBIAN_FRONTEND=noninteractive apt-get install -q -y --no-install-recommends valac gcc gettext itstool 
libgtk-3-dev libgtk-3-bin libgtksourceview-4-dev libmpc-dev libmpfr-dev libsoup2.4-dev libxml2-dev 
libgee-0.8-dev libvala-0.48 python3-pip ninja-build
     - pip3 install --upgrade setuptools
     - pip3 install --no-cache-dir meson>=0.50.0