MPD: Change format of audio visualizer output.

Since the default in ncmpcpp is `visualizer_in_stereo = yes`, this
setting should actually provide both channels.

packages/mpd/build.sh

@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE="https://www.musicpd.org"
 TERMUX_PKG_DESCRIPTION="music player daemon"
 TERMUX_PKG_VERSION=0.20.8
-TERMUX_PKG_REVISION=3
+TERMUX_PKG_REVISION=4
 TERMUX_PKG_SRCURL=https://github.com/MusicPlayerDaemon/MPD/archive/v$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_FOLDERNAME=MPD-$TERMUX_PKG_VERSION
 TERMUX_PKG_SHA256=b3ced73b44cf432ac8906deeb803e69235c1286b34c6986029ecf4fe8e351128

packages/mpd/mpdconf.example.patch

@@ -1,5 +1,5 @@
---- ../cache/MPD-0.20.6/doc/mpdconf.example	2017-03-10 15:57:59.000000000 +0000
-+++ ./doc/mpdconf.example	2017-05-17 07:48:09.273191173 +0000
+--- /data/data/com.termux/files/home/MPD-0.20.8.old/doc/mpdconf.example	2017-07-18 12:54:14.570036043 +0200
++++ mpdconf.example	2017-07-18 12:56:34.270035990 +0200
 @@ -10,14 +10,14 @@
  # be disabled and audio files will only be accepted over ipc socket (using
  # file:// protocol) or streaming files over an accepted protocol.
@@ -185,7 +185,7 @@
 +        type            "fifo"
 +        name            "ncmpcpp visualizer"
 +        path            "~/../usr/tmp/mpd.fifo"
-+        format          "44100:16:1"
++        format          "44100:16:2"
 +	enabled		"no"
 +}
 +