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

[Tim Bell]

Erik:

> 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


hotspot/test/runtime/ThreadSignalMask/exeThreadSignalMask.c
jdk/make/copy/Copy-java.desktop.gmk
jdk/src/java.base/unix/classes/java/lang/ProcessImpl.java

These legal notices need to be updated for 2016.  No need to redo the 
webrev if this is all the feedback you get.

Looks fine otherwise.

Tim