avcodec: bump minor version and add APIChanges for the new audio encoding API

doc/APIchanges

@@ -13,6 +13,14 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2012-xx-xx - lavc 53.34.0
+  New audio encoding API:
+  xxxxxxx Add CODEC_CAP_VARIABLE_FRAME_SIZE capability for use by audio
+          encoders.
+  xxxxxxx Add avcodec_fill_audio_frame() as a convenience function.
+  xxxxxxx Add avcodec_encode_audio2() and deprecate avcodec_encode_audio().
+          Add AVCodec.encode2().
+
 2012-01-xx - xxxxxxx - lavfi 2.15.0
   Add a new installed header -- libavfilter/version.h -- with version macros.
 

libavcodec/version.h

@@ -21,7 +21,7 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 33
+#define LIBAVCODEC_VERSION_MINOR 34
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \