[polari] Bump version to 3.15.3

[Florian Müllner <fmuellner src gnome org>]

commit 0816c08f275c735eb30a9bbd4520544231a3ffb1
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Dec 19 12:29:24 2014 +0100

    Bump version to 3.15.3
    
    Update NEWS.

 NEWS         |    8 ++++++++
 configure.ac |    2 +-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 1f7933c..8ae27c1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+3.15.3 - "A desert holiday"
+===========================
+* Suppress overshoot indicator when loading backlog [Florian; #740132]
+* Fix some corner-cases in type-ahead [Florian; #741756]
+
+Contributors:
+  Florian Müllner
+
 3.15.2 - "Tack-a-rama"
 ======================
 * Limit height of userlist popover [Jonas; #738518]
diff --git a/configure.ac b/configure.ac
index a0563fd..0f63806 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([polari],[3.15.2],[https://bugzilla.gnome.org/enter_bug.cgi?product=polari],[polari])
+AC_INIT([polari],[3.15.3],[https://bugzilla.gnome.org/enter_bug.cgi?product=polari],[polari])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([build-aux])