[gedit/fix-ci] Update gtksourceview and gedit-plugins to meson build system

[Jordi Mas <jmas src gnome org>]

commit 7f8406ed07a2d2eccd257f9b8155469ba4d8e9f0
Author: Jordi Mas <jmas softcatala org>
Date:   Mon Apr 29 22:31:30 2019 +0200

    Update gtksourceview and gedit-plugins to meson build system

 build-aux/flatpak/org.gnome.gedit.json | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.gedit.json b/build-aux/flatpak/org.gnome.gedit.json
index 0c1f18a43..0d62fcbb3 100644
--- a/build-aux/flatpak/org.gnome.gedit.json
+++ b/build-aux/flatpak/org.gnome.gedit.json
@@ -53,6 +53,7 @@
         },
         {
             "name" : "gtksourceview",
+            "buildsystem": "meson",
             "sources" : [
                 {
                     "type" : "git",
@@ -81,6 +82,7 @@
         },
         {
             "name" : "gedit-plugins",
+            "buildsystem": "meson",
             "sources" : [
                 {
                     "type" : "git",