Add -DUNALIGNED_ACCESS here, libsa/dosfs.c seems to need it.

Probably it ought to come from some generic .h file, but I've no idea
which - nor if any existing define has the same effect.
In any case this saves oodles of bytes in bootxx_msdos.

sys/arch/i386/stand/bootxx/Makefile.bootxx

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.bootxx,v 1.25 2006/10/23 21:57:46 christos Exp $
+# $NetBSD: Makefile.bootxx,v 1.26 2006/12/03 19:14:08 dsl Exp $
 
 S=	${.CURDIR}/../../../../../
 
@@ -70,6 +70,8 @@ CFLAGS+= -Wall -Wmissing-prototypes -Wstrict-prototypes
 CPPFLAGS+= -nostdinc -D_STANDALONE
 CPPFLAGS+= -I$S
 
+CPPFLAGS+= -DUNALIGNED_ACCESS
+
 CPPFLAGS+= -DLIBSA_SINGLE_FILESYSTEM=xxfs \
 		-DLIBSA_NO_TWIDDLE \
 		-DLIBSA_NO_FD_CHECKING \