test_tool: add dd decoder tool for ac3 test(read from spdif to pcm interface).

Change-Id: I17dcebadd271337db10d9743a8185c6eb521404f
Signed-off-by: qi.yuan <qi.yuan@amlogic.com>
diff --git a/Config.in b/Config.in
index e635de1..1a8fa2e 100755
--- a/Config.in
+++ b/Config.in
@@ -12,4 +12,5 @@
 
 source "../multimedia/libplayer/Config.in"
 source "../multimedia/wifidisplay/Config.in"
+source "../multimedia/test_tool/spdif_in_dd_decoder/Config.in"
 endmenu