Simplify NL

I think that when I added NL, I had troubles having access to CRLF's
address at boot time, which is why I had this system. But now that
CRLF is easily accessible during BOOT, we can simplify.

(and that will help us in the hopefully-upcoming change, which is
quite nice...)

blk/381

@@ -4,7 +4,7 @@
 : (print) C@+ ( a len ) 0 DO C@+ EMIT LOOP DROP ;
 : BS 8 EMIT ; : LF 10 EMIT ; : CR 13 EMIT ;
 : CRLF CR LF ; : SPC 32 EMIT ;
-: NL 0x0a RAM+ @ ( NLPTR ) ?DUP IF EXECUTE ELSE CRLF THEN ;
+: NL 0x0a RAM+ @ ( NLPTR ) EXECUTE ;
 : (uflw) LIT" stack underflow" ERR ;
 XCURRENT @ _xapply ORG @ 0x06 ( stable ABI uflw ) + !
 : (oflw) LIT" stack overflow" ERR ;

blk/396

@@ -5,7 +5,7 @@
     0 0x08 RAM+ !  ( 08 == C<* override )
     0 0x53 RAM+ !  ( 53 == (emit) override )
     0 0x55 RAM+ !  ( 55 == (key) override )
-    0 0x0a RAM+ !  ( NLPTR )
+    ['] CRLF 0x0a RAM+ ! ( NLPTR )
     ( 0c == C<* )
     ['] (boot<) 0x0c RAM+ !
     ['] C@ A@* ! ['] C! A!* !