[ostree] Update libgsystem

[Colin Walters <walters src gnome org>]

commit 3e9c3586284879415559364440be2adff36a66ed
Author: Colin Walters <walters verbum org>
Date:   Tue Sep 25 22:24:29 2012 -0400

    Update libgsystem
    
    This ensures we're disting the README, which makes the autogen.sh do
    the right thing.

 src/libgsystem |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libgsystem b/src/libgsystem
index 5ed135b..c6b949b 160000
--- a/src/libgsystem
+++ b/src/libgsystem
@@ -1 +1 @@
-Subproject commit 5ed135b8f56a4a7d085a7fa144fdc59131ba8d51
+Subproject commit c6b949b3ddd1c214db15a31ccdbdff70aa01fa26