Add host.1 to CLEANFILES.

MFC after:	3 days
X-MFC-To:	stable/10 only
Sponsored by:	The FreeBSD Foundation

usr.bin/host/Makefile

@@ -8,6 +8,7 @@ LDNSHOSTDIR=	${.CURDIR}/../../contrib/ldns-host
 PROG=		host
 SRCS=		ldns-host.c
 MAN=		host.1
+CLEANFILES+=	host.1
 
 host.1: ldns-host.1
 	sed -e 's/ldns-//gI' <${.ALLSRC} >${.TARGET} || \