hg: jdk9/sandbox/jdk: 8152733: Avoid creating Manifest when checking for Multi-Release attribute

[chris.hegarty at oracle.com]

Changeset: faf6d930aef4
Author:    redestad
Date:      2016-03-28 22:25 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/faf6d930aef4

8152733: Avoid creating Manifest when checking for Multi-Release attribute
Reviewed-by: psandoz, alanb
Contributed-by: claes.redestad at oracle.com, steve.drach at oracle.com

! src/java.base/share/classes/java/util/jar/JarFile.java
! test/java/util/jar/JarFile/MultiReleaseJarAPI.java