RFR: JDK-8055190: Cleanup include and exclude of core-libs native libraries after source code restructure

[Erik Joelsson]

Hello,

Please review this build patch, cleaning up some in the native 
compilation of some core libraries. After the source code restructure 
into modules, the need for explicit exclude and include of source files 
was reduced. This patch moves some OS specific files to OS specific 
source dirs and adjusts the makefiles. It's based on Magnus' review 
comments on the source code restructure change.

Bug: https://bugs.openjdk.java.net/browse/JDK-8055190
Webrev: http://cr.openjdk.java.net/~erikj/8055190/webrev.01/

/Erik