test_astobj2_weaken: Fix source file registration.

Update test_astobj2_weaken to use the new AST_REGISTER_FILE macro.

Change-Id: Ieedadf16610f2e042f393e0501a36447cd07f83d

tests/test_astobj2_weaken.c

@@ -30,7 +30,7 @@
 
 #include "asterisk.h"
 
-ASTERISK_FILE_VERSION(__FILE__, "$Revision: 419175 $")
+ASTERISK_REGISTER_FILE()
 
 #include "asterisk/utils.h"
 #include "asterisk/module.h"