FujiNet Clock Driver: Fix search continuation during install

When a SmartPort device was found that wasn't the FujiNet, the search
continuation used the wrong offset to get the high byte of the slot
address.

Also, fix the "jumbo" clock driver's Makefile to ensure it is rebuilt
when dependencies change.

clocks/fujinet/fn.clock.system.s

@@ -105,7 +105,7 @@ search_unit:
         dex
         bne     search_unit
 continue_slot_search:
-        ldx     sp_call+1 ; restore card
+        ldx     sp_call_hi ; restore card
         dex
         cpx     #$C0
         bne     search_slot

clocks/jumbo/Makefile

@@ -4,7 +4,14 @@ LDFLAGS = --config apple2-asm.cfg
 
 OUTDIR = out
 
-HEADERS = $(wildcard *.inc) $(wildcard ../inc/*.inc)
+HEADERS = $(wildcard *.inc) $(wildcard ../inc/*.inc) \
+	../ns.clock/ns.clock.system.s \
+	../romx/romxrtc.system.s \
+	../dclock/dclock.system.s \
+	../fujinet/fn.clock.system.s \
+	../fujinet/smartport.inc \
+	../cricket/cricket.system.s
+
 
 TARGETS = \
 	$(OUTDIR)/clock.system.SYS