Put mt.c back in there, but this time the problematic code that was in the file is commented out

Makefile.include

@@ -30,8 +30,8 @@ DUMMY := ${shell mkdir $(OBJECTDIR)}
 endif
 
 SYSTEM  = process.c procinit.c service.c autostart.c
-THREADS = #mt.c
-LIBS    = memb.c timer.c list.c etimer.c
+THREADS = mt.c
+LIBS    = memb.c timer.c list.c etimer.c #crtk.c
 CFS     = cfs.c cfs-ram.c
 CTK     = ctk.c
 UIP     = uip.c uiplib.c resolv.c tcpip.c psock.c hc.c uip-split.c \