[gnome-sdk-images] Remove most gtk binaries from the platform

[Alexander Larsson <alexl src gnome org>]

commit 873bb9ca07c77aea859ef69c447061ac226da699
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Mar 21 01:01:20 2017 +0100

    Remove most gtk binaries from the platform

 org.gnome.Sdk.json.in |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 64caa4b..b53e14f 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -371,6 +371,11 @@
                              "--enable-xdamage",
                              "--enable-x11-backend",
                              "--enable-wayland-backend" ],
+            "cleanup-platform": [
+                "/bin/gtk3-*",
+                "/bin/gtk-builder-tool",
+                "/bin/gtk-encode-symbolic-svg"
+            ],
             "sources": [
                 {
                     "type": "git",