Add forgotten minor bump and changelog entry for the SAP muxer

Originally committed as revision 25444 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -44,6 +44,7 @@ version <next>:
 - blackframe filter
 - Demuxer for Leitch/Harris' VR native stream format (LXF)
 - RTP depacketization of the X-QT QuickTime format
+- SAP (Session Announcement Protocol, RFC 2974) muxer
 
 
 version 0.6:

libavformat/avformat.h

@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 80
+#define LIBAVFORMAT_VERSION_MINOR 81
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \