修改API框架,兼容1806

Change-Id: Ic68e966a32e4c7ffd7137b3d7ba94e4d813c71b2
diff --git a/mbtk/mbtk_audio_lib/src/mbtk_audio.c b/mbtk/mbtk_audio_lib/src/mbtk_audio.c
new file mode 100755
index 0000000..8b13789
--- /dev/null
+++ b/mbtk/mbtk_audio_lib/src/mbtk_audio.c
@@ -0,0 +1 @@
+