[gnome-sdk-images] Use HTTP to clone libcanberra

[Mathieu Bridon <mbridon src gnome org>]

commit 6053b485077ced479d3302338f7cd30cc0bc17cd
Author: Mathieu Bridon <bochecha daitauha fr>
Date:   Mon Jul 31 16:19:44 2017 +0200

    Use HTTP to clone libcanberra
    
    Unfortunately its SSL certificate is self-signed.

 org.gnome.Sdk.json.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index bd996ac..58ec9e7 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -533,7 +533,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://git.0pointer.net/clone/libcanberra.git";
+                    "url": "http://git.0pointer.net/clone/libcanberra.git"; /* No HTTPS unfortunately */
                 }
             ]
         },