[gnome-continuous] manifest: Upgrade linux version to current stable branch 4.4

[Javier Jardón Cabezas <jjardon src gnome org>]

commit dbba94e8a433584492d2b36274b234cb8c8d9c7b
Author: Javier Jardón <jjardon gnome org>
Date:   Mon Feb 15 00:41:22 2016 +0000

    manifest: Upgrade linux version to current stable branch 4.4
    
    Lets see if this helps with gnome-shell crashing on kms_swrast_dri.so

 manifest.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index d0c0d3c..e0115cb 100644
--- a/manifest.json
+++ b/manifest.json
@@ -57,7 +57,7 @@
                  "child-components": [
                      {"src": "kernel:stable/linux-stable",
                       "name": "linux",
-                      "branch": "linux-3.18.y"}
+                      "branch": "linux-4.4.y"}
                  ]},
 
                {"src": "gnome:gtk-doc-stub",