[OpenJDK 2D-Dev] RFR: 8u backport of 8076419: Path2D copy constructors and clone method propagate size of arrays from source path

[Phil Race]

I have prepared a direct 8u-dev backport of the  JDK 9
fix for https://bugs.openjdk.java.net/browse/JDK-8076419

http://cr.openjdk.java.net/~prr/8076419.8u/

Please review.

For reference the JDK 9 review was here 
http://mail.openjdk.java.net/pipermail/2d-dev/2015-March/005246.html
and the JDK 9 changeset is here 
http://hg.openjdk.java.net/jdk9/client/jdk/rev/9e9588daa10c

-phil.