[folks] ci: Use Fedora 29 rather than Rawhide in CI

[Philip Withnall <pwithnall src gnome org>]

commit 33354595a405fd820630665bdc8f365beed21bed
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Nov 7 10:14:49 2018 +0000

    ci: Use Fedora 29 rather than Rawhide in CI
    
    Rawhide breaks too much (for example,
    https://gitlab.gnome.org/GNOME/folks/-/jobs/141496, where coreutils was
    conflicting on upgrade).
    
    Drop installing @buildsys-build, since installing the build deps for
    folks does all of that.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 .gitlab-ci.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0b25ced6..7cbf047e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,11 +1,11 @@
 stages:
   - build
 
-fedora-rawhide:
-  image: fedora:rawhide
+fedora-latest:
+  image: fedora:latest
   stage: build
   before_script:
-    - dnf update -y && dnf -y install dnf-plugins-core @buildsys-build
+    - dnf update -y && dnf -y install dnf-plugins-core redhat-rpm-config
     - dnf -y builddep folks
   script:
     # Configure