java/openjdk7: Update MASTER_SITES

Use a direct URL to Apache's release archive site as it's not mirrored
by upstream mirror sites

Approved by:	glewis (port maintainer), arrowd (mentor)
Differential Revision:	https://reviews.freebsd.org/D32427

java/openjdk7/Makefile

@@ -4,7 +4,7 @@ PORTNAME=	openjdk
 PORTVERSION=	${JDK_MAJOR_VERSION}.${JDK_UPDATE_VERSION}.${JDK_BUILD_NUMBER}.${BSD_JDK_VERSION}
 PORTEPOCH=	1
 CATEGORIES=	java devel
-MASTER_SITES=	APACHE/ant/binaries/:ant
+MASTER_SITES=	https://archive.apache.org/dist/ant/binaries/:ant
 DISTFILES=	${ANT_DISTFILE}${EXTRACT_SUFX}:ant
 
 MAINTAINER=	glewis@FreeBSD.org