hg: jdk8u/jdk8u-dev/jdk: 8069211: (zipfs) ZipFileSystem creates corrupted zip if entry output stream gets closed more than once

[zgu at redhat.com]

Changeset: 687f8a8caca1
Author:    sherman
Date:      2015-01-22 08:51 -0800
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/687f8a8caca1

8069211: (zipfs) ZipFileSystem creates corrupted zip if entry output stream gets closed more than once
Summary: to synchronize the write and close methods of the entry output stream
Reviewed-by: alanb

! src/share/demo/nio/zipfs/src/com/sun/nio/zipfs/ZipFileSystem.java
! test/demo/zipfs/ZipFSTester.java
! test/demo/zipfs/basic.sh