lang/cling: fix build ahead of CMake 3.20

The --target command-line argument is ignored when not applicable
in versions of CMake up to 3.20. It should never be necessary in
FreeBSD ports **anyway** since we generate a build system (ninja
or make) and use that, rather than building directly out of CMake.

Bumping PORTREVISION even though there shouldn't be a difference.

lang/cling/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=		cling
 DISTVERSION=		0.5-2018-08-13
-PORTREVISION=		4
+PORTREVISION=		5
 CATEGORIES=		lang devel
 MASTER_SITES=		https://root.cern.ch/download/cling/
 DISTNAME=		${PORTNAME}_${DISTVERSION:C/^[0-9]\.[0-9]-//}_sources
@@ -49,8 +49,7 @@ PLIST_SUB+=		LLVM_SUFFIX=${LLVM_SUFFIX} LLVM_RELEASE=${LLVM_RELEASE}
 CMAKE_BUILD_TYPE=	Release
 CMAKE_INSTALL_PREFIX=	${LLVM_PREFIX}
 
-CMAKE_ARGS+=	-DINSTALL_LAYOUT=FREEBSD \
-	    --target ${PORTNAME}
+CMAKE_ARGS+=	-DINSTALL_LAYOUT=FREEBSD
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|%%LLVM_PREFIX%%|${LLVM_PREFIX}|g' \