java/eclipse-cdt: Allow it to build with java > 1.6

It builds with openjdk7 at least.  I have no idea if it works, but the
rest of the eclipse ports have moved past 1.6.  (port is unmaintained)

java/eclipse-cdt/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	${PLUGIN}
 PORTVERSION=	6.0.2
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	java devel
 MASTER_SITES=	${MASTER_SITE_ECLIPSE}
 MASTER_SITE_SUBDIR=tools/${PLUGIN}/releases/${ECLIPSE_CODENAME}/dist
@@ -19,7 +19,7 @@ USES=		zip
 USE_JAVA=	YES
 JAVA_OS=	native
 JAVA_RUN=	YES
-JAVA_VERSION=	1.6
+JAVA_VERSION=	1.6+
 
 NO_BUILD=	YES
 NO_WRKSUBDIR=	YES