[nautilus/ci-rawhide] CI: use Rawhide image

[Ernestas Kulik <ernestask src gnome org>]

commit b4463978b042124a7dbc35d2ffbc1df1b3dd1fbf
Author: Ernestas Kulik <ernestask gnome org>
Date:   Wed Feb 21 19:19:52 2018 +0200

    CI: use Rawhide image
    
    Since we’re going to depend on an unstable GLib version that isn’t in
    F27 repos, this might be something we want to do.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bbe07c536..3674eb212 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: fedora:27
+image: fedora:rawhide
 
 stages:
   - test