Include the library versions in the publicly installed headers

This allows callers to conditionally use new API features without
breaking compatibility with the earlier versions of the library.

libAACdec/include/aacdecoder_lib.h

@@ -348,6 +348,10 @@ Where N equals to CStreamInfo::frameSize .
 
 #include "genericStds.h"
 
+#define AACDECODER_LIB_VL0 2
+#define AACDECODER_LIB_VL1 5
+#define AACDECODER_LIB_VL2 17
+
 /**
  * \brief  AAC decoder error codes.
  */

libAACenc/include/aacenc_lib.h

@@ -705,6 +705,9 @@ the encoder deactivates PNS calculation internally.
 #include "machine_type.h"
 #include "FDK_audio.h"
 
+#define AACENCODER_LIB_VL0 3
+#define AACENCODER_LIB_VL1 4
+#define AACENCODER_LIB_VL2 22
 
 /**
  *  AAC encoder error codes.