[metacity] update .gitlab-ci.yml

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 0636df40600fe499d61a4d31ef944b3eebb704ea
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Sep 2 00:33:59 2018 +0000

    update .gitlab-ci.yml

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0c9dbee5..973ec926 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,6 +9,8 @@ build-ubuntu:
     - apt-get install -q -y --no-install-recommends
                       autoconf-archive
                       automake
+                      build-essential
+                      gettext
                       gsettings-desktop-schemas-dev
                       libcanberra-gtk3-dev
                       libglib2.0-dev