[8u60] Request for approval: JDK-8075495: Update jtreg bin location in configure

[Erik Joelsson]

Hello,

Could I please get an approval to backport this change from jdk9 to jdk8u?

Bug: https://bugs.openjdk.java.net/browse/JDK-8075495
Review thread: 
http://mail.openjdk.java.net/pipermail/build-dev/2015-March/014608.html
Jdk9 changeset: http://hg.openjdk.java.net/jdk9/dev/rev/5c624e587f07

The same patch applies to cleanly, except of course, for the generated 
configure script needing to be regenerated.

/Erik