[gnome-build-meta] Add new GStreamer dependencies for GTK+

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d1d71ea1d72d1a23ad463e580cbfe4dde47f83df
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Mon Mar 19 11:22:02 2018 -0500

    Add new GStreamer dependencies for GTK+

 elements/core-deps/gtk+.bst | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/elements/core-deps/gtk+.bst b/elements/core-deps/gtk+.bst
index 924a7ef..0c5ccb5 100644
--- a/elements/core-deps/gtk+.bst
+++ b/elements/core-deps/gtk+.bst
@@ -10,6 +10,9 @@ depends:
 - core-deps/glib.bst
 - core-deps/gobject-introspection.bst
 - core-deps/graphene.bst
+- core-deps/gst-plugins-bad.bst
+- core-deps/gst-plugins-base.bst
+- core-deps/gstreamer.bst
 - core-deps/gtk-doc.bst
 - core-deps/m4-common.bst
 - core-deps/meson.bst