[gnome-shell] Restore gnome-shell-sass submodule

[Florian Müllner <fmuellner src gnome org>]

commit b0b5be63b921e117236000e507195a60e3a03d49
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Sep 11 19:17:36 2016 +0200

    Restore gnome-shell-sass submodule
    
    Commit 68f439425bd accidentally dropped the changes from the last
    couple of months ...

 data/theme/gnome-shell-sass |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/gnome-shell-sass b/data/theme/gnome-shell-sass
index 6ccc180..b219008 160000
--- a/data/theme/gnome-shell-sass
+++ b/data/theme/gnome-shell-sass
@@ -1 +1 @@
-Subproject commit 6ccc1808114d803f6699877143c614f14aaf14ea
+Subproject commit b2190083c256564258fce97645ae6da72e9d0f7f