[gitg] Flatpak: Switch runtime to gnome-sdk master

[Alberto Fanjul <albfan src gnome org>]

commit d59ebfd078fc2bfce51f83756ae8f90b6d307f8c
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Thu Aug 2 21:38:24 2018 +0000

    Flatpak: Switch runtime to gnome-sdk master

 .gitlab-ci.yml      | 2 +-
 org.gnome.Gitg.json | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7966a443..68d2319f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ variables:
     BUNDLE: "gitg-git.flatpak"
 
 flatpak:
-    image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:3.28
+    image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
     stage: test
 
     variables:
diff --git a/org.gnome.Gitg.json b/org.gnome.Gitg.json
index 3f3ab661..8125b2eb 100644
--- a/org.gnome.Gitg.json
+++ b/org.gnome.Gitg.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "org.gnome.gitg",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "3.28",
+    "runtime-version" : "master",
     "branch" : "master",
     "sdk" : "org.gnome.Sdk",
     "command" : "gitg",
@@ -134,6 +134,7 @@
         },
         {
             "name" : "gtksourceview",
+            "config-opts" : [ "--disable-Werror" ],
             "sources" : [
                 {
                     "type" : "git",