[gnome-sdk-images] Update wayland-protocols to 1.7 as needed by Gtk master

[Alexander Larsson <alexl src gnome org>]

commit 4d1792d604790f47ace0327ab7a180102d87e94e
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Aug 31 16:35:47 2016 +0200

    Update wayland-protocols to 1.7 as needed by Gtk master
    
    Turns out 1.6 was not enough.

 org.gnome.Sdk.json.in |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 8ccc7b4..2fb7539 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -244,8 +244,8 @@
             "sources": [
                  {
                      "type": "archive",
-                     "url": "http://wayland.freedesktop.org/releases/wayland-protocols-1.6.tar.xz";,
-                     "sha256": "9e4070bcaa38d38fa66bf055c6b5ad9c7c2553a78b2dbe5493fe0f3764d00e81"
+                     "url": "http://wayland.freedesktop.org/releases/wayland-protocols-1.7.tar.xz";,
+                     "sha256": "635f2a937d318f1fecb97b54074ca211486e38af943868dd0fa82ea38d091c1f"
                  }
             ]
         },