Add a port of OpenJDK 12

svn path=/head/; revision=496410

java/Makefile

@@ -112,6 +112,7 @@
     SUBDIR += openjdk8
     SUBDIR += openjdk8-jre
     SUBDIR += openjdk11
+    SUBDIR += openjdk12
     SUBDIR += openjfx8-devel
     SUBDIR += openjfx8-scenebuilder
     SUBDIR += phpeclipse

java/openjdk12/files/patch-configure

@@ -0,0 +1,14 @@
+--- configure.orig	2019-03-12 12:38:39.648907000 -0700
++++ configure	2019-03-12 12:39:04.275572000 -0700
+@@ -1,4 +1,4 @@
+-#!/bin/bash
++#!%%LOCALBASE%%/bin/bash
+ #
+ # Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+@@ -32,4 +32,4 @@
+ # Delegate to wrapper, forcing wrapper to believe $0 is this script by using -c.
+ # This trick is needed to get autoconf to co-operate properly.
+ # The ${-:+-$-} construction passes on bash options.
+-bash ${-:+-$-} -c ". $this_script_dir/make/autoconf/configure" $this_script_dir/configure CHECKME $this_script_dir "$@"
++%%LOCALBASE%%/bin/bash ${-:+-$-} -c ". $this_script_dir/make/autoconf/configure" $this_script_dir/configure CHECKME $this_script_dir "$@"

java/openjdk12/pkg-descr

@@ -0,0 +1,3 @@
+An open-source implementation of the Java Platform, Standard Edition,
+
+WWW: https://openjdk.java.net/

java/openjdk12/pkg-message

@@ -0,0 +1,16 @@
+======================================================================
+
+This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
+procfs(5) mounted on /proc.
+
+If you have not done it yet, please do the following:
+
+	mount -t fdescfs fdesc /dev/fd
+	mount -t procfs proc /proc
+
+To make it permanent, you need the following lines in /etc/fstab:
+
+	fdesc	/dev/fd		fdescfs		rw	0	0
+	proc	/proc		procfs		rw	0	0
+
+======================================================================