[gnome-flashback] sound-applet: update submodule

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 0c48b3fccca031ac53ecd17fdbb22b9ee315c638
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Apr 11 11:03:13 2017 +0300

    sound-applet: update submodule

 gnome-flashback/libsound-applet/gvc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gnome-flashback/libsound-applet/gvc b/gnome-flashback/libsound-applet/gvc
index 25bf3ed..ce8e488 160000
--- a/gnome-flashback/libsound-applet/gvc
+++ b/gnome-flashback/libsound-applet/gvc
@@ -1 +1 @@
-Subproject commit 25bf3ed75fa604fa73e8b25241119a993fc659d6
+Subproject commit ce8e4880ce31e275c40825c4ed756c791107f810