ci: Add valgrind to fedora Docker image

It will be used in an upcoming commit.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #487

.gitlab-ci.yml

@@ -14,7 +14,7 @@ variables:
   MESON_COMMON_OPTIONS: "--buildtype debug --fatal-meson-warnings"
 
 fedora-x86_64:
-  image: registry.gitlab.gnome.org/gnome/glib/fedora:v2
+  image: registry.gitlab.gnome.org/gnome/glib/fedora:v3
   stage: build
   except:
     - tags
@@ -84,7 +84,7 @@ debian-stable-x86_64:
       - "_build/${CI_JOB_NAME}-report.xml"
 
 G_DISABLE_ASSERT:
-  image: registry.gitlab.gnome.org/gnome/glib/fedora:v2
+  image: registry.gitlab.gnome.org/gnome/glib/fedora:v3
   stage: build
   except:
     - tags
@@ -255,7 +255,7 @@ freebsd-12-x86_64:
       - "_build/${CI_JOB_NAME}-report.xml"
 
 coverage:
-  image: registry.gitlab.gnome.org/gnome/glib/fedora:v2
+  image: registry.gitlab.gnome.org/gnome/glib/fedora:v3
   stage: coverage
   except:
     - tags
@@ -268,7 +268,7 @@ coverage:
   coverage: '/^\s+lines\.+:\s+([\d.]+\%)\s+/'
 
 scan-build:
-  image: registry.gitlab.gnome.org/gnome/glib/fedora:v2
+  image: registry.gitlab.gnome.org/gnome/glib/fedora:v3
   stage: analysis
   except:
     - tags
@@ -301,7 +301,7 @@ pages:
       - public
 
 dist-job:
-  image: registry.gitlab.gnome.org/gnome/glib/fedora:v2
+  image: registry.gitlab.gnome.org/gnome/glib/fedora:v3
   stage: build
   only:
     - tags

.gitlab-ci/fedora.Dockerfile

@@ -47,6 +47,7 @@ RUN dnf -y install \
     shared-mime-info \
     systemtap-sdt-devel \
     unzip \
+    valgrind \
     wget \
     xz \
     zlib-devel \