Retire use of stripnulls

Now ObjAsm can ALIGN with arbitrary numbers, use the same trick FileCore does in its header by padding with newlines.
Not tagged.

Makefile

@@ -645,7 +645,6 @@ lib.clib: ${CLIB_MOD_OBJS}
 # Derived headers:
 derived.swis: o.swis
 	${LD} -bin -o $@ o.SWIs
-	stripnulls $@
 	settype $@ text
 
 o.swis: s.makehswis h.swisheader s.swioptions

s/makehswis

@@ -122,4 +122,7 @@ string2 SETS    "&":CC:(:STR:value)
         =       10
         =       "#endif", 10
 
+; Pad to word align with harmless newlines
+        ALIGN   4, 0, 10
+
         END