[gnome-build-meta/jjardon/ci] .gitlab-ci.yml: Run job only for master

[Javier Jardón Cabezas <jjardon src gnome org>]

commit cf7119917c06ca37e9f6ad46d39e72f82ce5a83f
Author: Javier Jardón <jjardon gnome org>
Date:   Thu Feb 22 15:30:00 2018 +0000

    .gitlab-ci.yml: Run job only for master
    
    We want to eventually have a pre-commit CI, but currently this would take too
    much time as we will have to build almost everything every time, as
    we are followinf master of everything

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ccc61cd..8ea067d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,3 +42,5 @@ bst-build-gnome-core:
     - ${BST} build --track-all core.bst
   <<: *bst_cache
   <<: *bst_artifacts
+  only:
+    - master