2 more ports: convert to USES+= zip

USES=zip is currently desired when all distfiles are zip archives, unless
the after-extraction arguments are tailored for ${TAR}.  Currently
USES=zip is incompatible with multiple distfiles of different formats,
but this is being worked on.

Approved by:	general infrastructure blanket

archivers/ruby-lha/Makefile

@@ -9,11 +9,11 @@ MASTER_SITES=	http://arton.no-ip.info/data/lhalib/
 PKGNAMEPREFIX=	${RUBY_PKGNAMEPREFIX}
 DISTNAME=	lhalib-${PORTVERSION}
 DIST_SUBDIR=	ruby
-EXTRACT_SUFX=	.zip
 
 MAINTAINER=	ruby@FreeBSD.org
 COMMENT=	Ruby extension to unpack LHA-compressed files
 
+USES=		zip
 USE_RUBY=	yes
 USE_RUBY_EXTCONF=	yes
 RUBY_EXTCONF=	ext/extconf.rb

graphics/mupdf/Makefile

@@ -22,7 +22,7 @@ LIB_DEPENDS=	libfreetype.so:${PORTSDIR}/print/freetype2 \
 
 MAKE_ARGS+=	build=release prefix=${PREFIX} verbose=1 mandir=${PREFIX}/man \
 		XCFLAGS=-I${LOCALBASE}/include
-USES=		pkgconfig gmake
+USES=		pkgconfig gmake zip
 USE_XORG=	x11 xext
 
 WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION}-source