[simple-scan/cherry-pick-b77e6aad-2] Fix build on Ubuntu 20.04

[Bartosz <bkosiorek src gnome org>]

commit 55310297e19702acc8d0163403313b18553db610
Author: Bartosz Kosiorek <gang65 poczta onet pl>
Date:   Fri Apr 24 10:24:35 2020 +0000

    Fix build on Ubuntu 20.04
    
    With Ubuntu 20.04 the following question is displayed, which stops
    the CI execution:
    
    Please select the geographic area in which you live. Subsequent configuration
     questions will narrow this down by presenting a list of cities, representing
     the time zones in which they are located.
       1. Africa      4. Australia  7. Atlantic  10. Pacific  13. Etc
       2. America     5. Arctic     8. Europe    11. SystemV
       3. Antarctica  6. Asia       9. Indian    12. US
     Geographic area:
    
    To resolve it non-interactive mode is enabled
    
    
    (cherry picked from commit b77e6aad5689fc44162b9a9a2879b82e6ba39e1b)

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 92d8b82..f9c6554 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ build-ubuntu:
   image: ubuntu:rolling
   before_script:
     - apt-get update
-    - apt-get install -q -y --no-install-recommends meson valac gcc gettext itstool libgtk-3-dev libgusb-dev 
libcolord-dev libpackagekit-glib2-dev libwebp-dev libsane-dev
+    - DEBIAN_FRONTEND=noninteractive apt-get install -q -y --no-install-recommends meson valac gcc gettext 
itstool libgtk-3-dev libgusb-dev libcolord-dev libpackagekit-glib2-dev libwebp-dev libsane-dev
   script:
     - meson _build
     - ninja -C _build install