[mutter] ci: Move FDO_UPSTREAM_REPO to global scope

[Marge Bot <marge-bot src gnome org>]

commit 035527cdcb1161127575aafbac8e07037f4f8875
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Jul 19 13:56:55 2021 +0200

    ci: Move FDO_UPSTREAM_REPO to global scope
    
    ci-fairy also uses the variable to set the upstream remote that is used
    to build the commit range to check.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1936>

 .gitlab-ci.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index db340f8f5d..a13480a6bc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,11 +9,13 @@ stages:
  - test
  - analyze
 
+variables:
+  FDO_UPSTREAM_REPO: GNOME/mutter
+
 .mutter.fedora:34@common:
   variables:
     FDO_DISTRIBUTION_VERSION: 34
     BASE_TAG: '2021-07-09.1'
-    FDO_UPSTREAM_REPO: GNOME/mutter
     FDO_DISTRIBUTION_PACKAGES: 'gdm gnome-shell xorg-x11-server-Xvfb sassc gcovr clang'
 
     FDO_DISTRIBUTION_EXEC: |