[mutter] Bump version to 3.15.4

[Florian Müllner <fmuellner src gnome org>]

commit 3a5a647d494b481cf60b0ffdd9856ebb4974c9cc
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Jan 21 14:51:51 2015 +0100

    Bump version to 3.15.4
    
    Update NEWS.

 NEWS         |   20 ++++++++++++++++++++
 configure.ac |    2 +-
 2 files changed, 21 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 3ae8eab..c3b35f2 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,23 @@
+3.15.4
+======
+* Use GTK+ theme for window decorations instead of metacity [Florian; #741917]
+* Export the same EDID information on X11 and wayland [Carlos; #742882]
+* Apply input device configuration on wayland [Carlos; #739397]
+* Implement pointer barriers on wayland [Jonas; #706655]
+* Misc. bug fixes (Ting-Wei, Rui, Ikey, Florian, Marek, Jonas; #741829,
+  #738630, #737463, #698995, #727893, #742825, #742824, #742841, #743173,
+  #743189, #743217, #743254]
+
+Contributors:
+  Jonas Ådahl, Giovanni Campagna, Marek Chalupa, Ikey Doherty, Adel Gadllah,
+  Carlos Garnacho, Ting-Wei Lan, Rui Matos, Florian Müllner, Jasper St. Pierre,
+  Rico Tzschichholz
+
+Translations:
+  Matej Urbančič [sl], Balázs Úr [hu], Marek Černocký [cs],
+  Inaki Larranaga Murgoitio [eu], Rafael Ferreira [pt_BR],
+  Daniel Mustieles [es], Fran Dieguez [gl]
+
 3.15.3
 ======
 * Don't leave left-over frames queued [Owen; #738686]
diff --git a/configure.ac b/configure.ac
index 171f67c..25ddf33 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ AC_PREREQ(2.62)
 
 m4_define([mutter_major_version], [3])
 m4_define([mutter_minor_version], [15])
-m4_define([mutter_micro_version], [3])
+m4_define([mutter_micro_version], [4])
 
 m4_define([mutter_version],
           [mutter_major_version.mutter_minor_version.mutter_micro_version])