[gnome-build-meta] .gitlab-ci.yml: add x86_64 tag to the track job

[Abderrahim Kitouni <akitouni src gnome org>]

commit eb386bd8a431e3e33acf327cef34713f00e5d930
Author: Abderrahim Kitouni <akitouni gnome org>
Date:   Tue Dec 11 06:29:21 2018 +0100

    .gitlab-ci.yml: add x86_64 tag to the track job
    
    even though the job is arch-independent, we're using an x86_64 docker image

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c5ccb8c..6c02ce1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -153,6 +153,7 @@ track:
 
   <<: *cache
   tags:
+    - x86_64
     - gnome-build-meta
   # don't run on stable branches
   except: