[gimp] gitlab-ci: add gobject-introspection dep for babl and gegl

[Øyvind "pippin" Kolås <ok src gnome org>]

commit baf3bfee491d83d48f4d1b2eb487ffc61bbb4db6
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Aug 8 14:15:36 2019 +0200

    gitlab-ci: add gobject-introspection dep for babl and gegl

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f67e615e97..4e0ed5b69b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,6 +24,7 @@ image: archlinux/base:latest
     - pacman -Syu --noconfirm --needed --cachedir `pwd`/_pacman_cache
         git
         base-devel
+        gobject-introspection
         meson
         lcms2
     - git clone --depth=$GIT_DEPTH https://gitlab.gnome.org/GNOME/babl.git _babl
@@ -64,6 +65,7 @@ babl-git-meson:
         lcms2
         base-devel
         ffmpeg
+        gobject-introspection
         graphviz
         jasper
         json-glib