[gnome-shell] Bump required clutter version to 1.5.15

[Adel Gadllah <agadllah src gnome org>]

commit 3b797b32bc3f2b1a8c799ff4a73e79ef70cf0a99
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Wed Jan 26 20:44:32 2011 +0100

    Bump required clutter version to 1.5.15
    
    This is required for Clutter.BindCoordinate.POSITION

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b3c0b24..d19bce0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,7 @@ fi
 
 AM_CONDITIONAL(BUILD_RECORDER, $build_recorder)
 
-CLUTTER_MIN_VERSION=1.5.8
+CLUTTER_MIN_VERSION=1.5.15
 GOBJECT_INTROSPECTION_MIN_VERSION=0.10.1
 GJS_MIN_VERSION=0.7.8
 MUTTER_MIN_VERSION=2.91.4