[gnome-builder] manifest: pin json-glib to autotools branch

[Christian Hergert <chergert src gnome org>]

commit e7eb1557c0debc3124e3dc5263affe81726ff235
Author: Christian Hergert <chergert redhat com>
Date:   Sun Mar 19 04:33:43 2017 -0700

    manifest: pin json-glib to autotools branch

 org.gnome.Builder.json |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Builder.json b/org.gnome.Builder.json
index edd0631..804f291 100644
--- a/org.gnome.Builder.json
+++ b/org.gnome.Builder.json
@@ -278,7 +278,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://git.gnome.org/browse/json-glib";
+                    "url": "https://git.gnome.org/browse/json-glib";,
+                    "branch": "json-glib-1-2"
                 }
             ]
         },