[gnome-sdk-images] Fix pygobject build

[Alexander Larsson <alexl src gnome org>]

commit 6b1e01e5b601a05635797b5770451417d63e0bbf
Author: Alexander Larsson <alexl redhat com>
Date:   Fri Jan 20 14:59:25 2017 +0100

    Fix pygobject build
    
    It was failing due to pygobject using -Werror, see:
    https://bugzilla.gnome.org/show_bug.cgi?id=777534
    
    disabling errors for now

 org.gnome.Sdk.json.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index f38647a..0ff6970 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -777,6 +777,7 @@
         },
         {
             "name": "pygobject",
+            "config-opts": ["--enable-compile-warnings=minimum"],
             "build-options" : {
                 "env": {
                     "PYTHON": "/usr/bin/python3"