Contribs: update shout to 2.3.1

(support for webm and Opus)

contrib/src/shout/SHA512SUMS

-f6ebe556ab10cc67201d35f1172127a411ebb28494a7873474c9f33077e2f097244b0fb94d861ff258a2b887a17afbe4c6916283cc234ead6d0981d85fe45ee5  libshout-2.2.2.tar.gz
+19c1421e654310ddbc25f343d205d921b7c3f1c9c97f028207deaf1a46150b7f6c8069d52b7a3c9ed72dda276b52237cf1208292fbfa09aa7d09f85072c46a7b  libshout-2.3.1.tar.gz

contrib/src/shout/libshout-win32.patch

@@ -11,14 +11,14 @@ diff -u libshout/include/shout/shout.h.in libshout-new/include/shout/shout.h.in
  
  #define SHOUTERR_SUCCESS	(0)
  #define SHOUTERR_INSANE		(-1)
---- libshout/Makefile.in	2009-06-15 02:28:13.000000000 +0200
-+++ libshout/Makefile.in	2009-06-15 02:29:10.000000000 +0200
-@@ -246,7 +246,7 @@
- target_alias = @target_alias@
+--- libshout-2.3.1/Makefile.in.orig	2012-05-25 17:21:33.000000000 +0200
++++ libshout-2.3.1/Makefile.in	2012-08-08 00:08:03.968189479 +0200
+@@ -288,7 +288,7 @@
+ top_srcdir = @top_srcdir@
  AUTOMAKE_OPTIONS = 1.6 foreign
  ACLOCAL_AMFLAGS = -I m4
 -SUBDIRS = include src examples debian doc win32
 +SUBDIRS = include src doc win32
- EXTRA_DIST = INSTALL m4/shout.m4 m4/ac_config_libconfig_in.m4 m4/acx_pthread.m4 \
+ EXTRA_DIST = INSTALL m4/shout.m4 m4/acx_pthread.m4 \
  	m4/ogg.m4 m4/vorbis.m4 m4/xiph_compiler.m4 m4/xiph_net.m4 \
  	m4/xiph_types.m4

contrib/src/shout/rules.mak

 # shout
 
-SHOUT_VERSION := 2.2.2
+SHOUT_VERSION := 2.3.1
 SHOUT_URL := http://downloads.us.xiph.org/releases/libshout/libshout-$(SHOUT_VERSION).tar.gz
 
 ifdef BUILD_ENCODERS