Added audiotest and initial work on audio demo sample

git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/aps-direct@2463 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/debug.c b/pjsip-apps/src/samples/debug.c
index c7453d9..1a145b9 100644
--- a/pjsip-apps/src/samples/debug.c
+++ b/pjsip-apps/src/samples/debug.c
@@ -28,5 +28,5 @@
  * E.g.:
  *  #include "playfile.c"
  */
-#include "aectest.c"
+#include "auddemo.c"