New debug scheme with explicit debug channels declaration.

if1632/builtin.c

diff --git a/if1632/builtin.c b/if1632/builtin.c
index f66f150..b824e49 100644
--- a/if1632/builtin.c
+++ b/if1632/builtin.c
@@ -23,6 +23,8 @@
 #include "task.h"
 #include "debug.h"
 
+DEFAULT_DEBUG_CHANNEL(module)
+
 /* Built-in modules descriptors */
 /* Don't change these structures! (see tools/build.c) */