extra/java8-openjdk: add patch

extra/java8-openjdk/zero.patch

@@ -0,0 +1,44 @@
+diff -r 99f1cf3520d9 -r b1d3888c0ae7 src/os_cpu/linux_zero/vm/thread_linux_zero.hpp
+--- a/src/os_cpu/linux_zero/vm/thread_linux_zero.hpp	Tue Feb 16 13:20:38 2016 -0800
++++ b/src/os_cpu/linux_zero/vm/thread_linux_zero.hpp	Wed Feb 17 17:03:31 2016 -0500
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
++ * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
+  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+  *
+@@ -110,6 +110,7 @@
+                                            void* ucontext,
+                                            bool isInJava) {
+     ShouldNotCallThis();
++    return false; // silence compile warning
+   }
+ 
+   // These routines are only used on cpu architectures that
+
+diff -r 39575526c6d9 -r f5f2a2d13775 src/os/linux/vm/os_linux.inline.hpp
+--- a/src/os/linux/vm/os_linux.inline.hpp	Thu Oct 12 01:18:38 2017 +0000
++++ b/src/os/linux/vm/os_linux.inline.hpp	Mon Sep 18 15:06:28 2017 +0200
+@@ -98,6 +98,11 @@
+ 
+ inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
+ {
++// readdir_r has been deprecated since glibc 2.24.
++// See https://sourceware.org/bugzilla/show_bug.cgi?id=19056 for more details.
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
++
+   dirent* p;
+   int status;
+   assert(dirp != NULL, "just checking");
+@@ -111,6 +116,8 @@
+     return NULL;
+   } else
+     return p;
++
++#pragma GCC diagnostic pop
+ }
+ 
+ inline int os::closedir(DIR *dirp) {
+