[gnome-getting-started-docs] Sync .gitlab-ci.yml with g-u-docs

[Petr Kovář <pmkovar src gnome org>]

commit fc5254e36e294a0ae589fe0c419f590d885c5e32
Author: Petr Kovar <pkovar redhat com>
Date:   Sun Aug 4 19:00:00 2019 +0200

    Sync .gitlab-ci.yml with g-u-docs

 .gitlab-ci.yml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 53e3afd..73a454a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,8 +1,10 @@
 build-fedora:
   image: fedora:latest
   before_script:
-    - dnf install -y git autoconf automake make gettext itstool yelp-tools
+    - dnf install -y git autoconf automake make gettext itstool libxslt yelp-tools
   script:
-    - ./autogen.sh
+    - yelp-check ids gnome-help/C
+    - yelp-check validate gnome-help/C
+    - ./autogen.sh ITSTOOL="/usr/bin/itstool --strict"
     - make
     - make check