RFR: 8056216 : Remove "sun" directory layer from libawt and common

[Phil Race]

https://bugs.openjdk.java.net/browse/JDK-8056216
http://cr.openjdk.java.net/~prr/8056216/

This is all just removing the sequence "sun/" from various pathnames.

Aside from the make file changes there are over 600 file moves which I 
don't think
its worth including in the webrev but they are the result of the 
following 'hg mv' commands

hg mv src/java.desktop/windows/native/libawt/sun/* 
src/java.desktop/windows/native/libawt/
hg mv src/java.desktop/windows/native/common/sun/awt 
src/java.desktop/windows/native/common
hg mv src/java.desktop/share/native/libawt/sun/* 
src/java.desktop/share/native/libawt
hg mv src/java.desktop/share/native/common/sun/* 
src/java.desktop/share/native/common
hg mv src/java.desktop/macosx/native/libawt_lwawt/sun/* 
src/java.desktop/macosx/native/libawt_lwawt
hg mv src/java.desktop/unix/native/libawt/sun/* 
src/java.desktop/unix/native/libawt
hg mv src/java.desktop/unix/native/common/sun/* 
src/java.desktop/unix/native/common
hg mv src/java.desktop/unix/native/libawt_headless/sun/awt 
src/java.desktop/unix/native/libawt_headless
hg mv src/java.desktop/unix/native/libawt_xawt/sun/* 
src/java.desktop/unix/native/libawt_xawt/

I have done full open+closed builds via JPRT on all platforms ...

-phil.