[gtk/ebassi/ci-only] ci: Specify `only` for other jobs

[Emmanuele Bassi <ebassi src gnome org>]

commit de5fa3ed93aae1db585d923ac7ac0ef05af0a3ee
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Jan 7 16:03:10 2021 +0000

    ci: Specify `only` for other jobs
    
    Otherwise MRs will only run macOS jobs.

 .gitlab-ci.yml | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5b5ee631a3..745f3f9399 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -44,6 +44,10 @@ style-check-diff:
 
 .build-fedora-default:
   image: $FEDORA_IMAGE
+  only:
+    - master
+    - merge_requests
+    - branches
   artifacts:
     when: always
     reports:
@@ -122,6 +126,10 @@ installed-tests:
 
 .mingw-defaults:
   stage: build
+  only:
+    - master
+    - merge_requests
+    - branches
   tags:
     - win32-ps
   script: