Add a NOFORTH variable so we can build a smaller loader without

Forth support, for use with PicoBSD

Approved-By: jordan

sys/boot/i386/loader/Makefile

@@ -16,6 +16,7 @@ SRCS=		main.c conf.c
 HAVE_PNP=	yes
 HAVE_ISABUS=	yes
 
+.if !defined(NOFORTH)
 # Enable BootForth
 BOOT_FORTH=	yes
 CFLAGS+=	-DBOOT_FORTH -I${.CURDIR}/../../ficl -I${.CURDIR}/../../ficl/i386
@@ -24,6 +25,7 @@ LIBFICL=	${.OBJDIR}/../../ficl/libficl.a
 .else
 LIBFICL=	${.CURDIR}/../../ficl/libficl.a
 .endif
+.endif
 
 # Always add MI sources 
 .PATH:		${.CURDIR}/../../common