[gnome-shell] build: bump clutter requirement to 1.15.90

[Tim Lunn <timl src gnome org>]

commit 335744e78af2a9979bf81d3c8dde0befdc3aead1
Author: Tim Lunn <tim feathertop org>
Date:   Mon Jan 20 21:03:09 2014 +1100

    build: bump clutter requirement to 1.15.90
    
    PopupMenus don't render properly with clutter older than this.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=722593

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ac69712..d1bb669 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,7 +73,7 @@ AS_IF([test x$enable_systemd != xno], [
 
 AC_MSG_RESULT($enable_systemd)
 
-CLUTTER_MIN_VERSION=1.13.4
+CLUTTER_MIN_VERSION=1.15.90
 GOBJECT_INTROSPECTION_MIN_VERSION=0.10.1
 GJS_MIN_VERSION=1.39.0
 MUTTER_MIN_VERSION=3.11.1