RFR: JDK-8066474: Remove the lib/$ARCH directory from Linux and Solaris images

[Erik Joelsson]

Hello,

Please review this change which removes the $ARCH sub directory in the 
lib directory of the runtime images, which is an outstanding issue from 
the new runtime images. Most of the changes are in the build, but there 
are some in hotspot and launcher source. I have verified -testset 
hotspot and default in JPRT as well as tried to run as many jtreg tests 
as possible locally. I could only really find two tests that needed to 
be adjusted.

Bug: https://bugs.openjdk.java.net/browse/JDK-8066474

Webrev: http://cr.openjdk.java.net/~erikj/8066474/webrev.01

/Erik