Recent Minor Change to Makefiles.

[Brad Wetmore]

I just made a minor change to the JCE makefiles.  I forgot to have it 
reviewed by you, sorry!  Fortunately the changes are very minor.

http://hg.openjdk.java.net/jdk8/tl/jdk/rev/940c8cc5a5c4

1.  I'm adding the missing Manifest file to several of the JCE jar files.

2.  Changing the string stored in the manifest file from $RELEASE to 
$JDK_VERSION

Brad