[gimp/wip/Jehan/sync-gitlab-ci-master-2-10] gitlab-ci: libspiro is needed to run `gegl`.

[Jehan <jehanp src gnome org>]

commit 97549081fd535e1a801dbd37c3b9c1d6ffea50ba
Author: Jehan <jehan girinstud io>
Date:   Mon Apr 13 14:22:45 2020 +0200

    gitlab-ci: libspiro is needed to run `gegl`.
    
    `gegl` binary is being run for icon generations on gimp-2-10.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b6c581ad65..04b8e591e3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -107,6 +107,7 @@ deps-debian/testing:
         libpoppler-glib-dev
         libraw19
         librsvg2-dev
+        libspiro-dev
         libtiff-dev
         libtool
         libumfpack5