RFR: JDK-8210794: Incorrect escaping of $ORIGIN in native test libraries

[Tim Bell]

Erik:

> This patch fixes an escaping issue that causes a broken runpath to be 
> set in test libraries.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8210794
> 
> Webrev: http://cr.openjdk.java.net/~erikj/8210794/webrev.01/index.html

Looks good.

Tim