RFR: JDK-8025128,File.createTempFile fails if prefix is absolute path

[Dan Xu]

Hi,

Recently I made changes in TempDirectory.generateFile() method to 
prevent using invalidparameters to create temporary files. But such 
tight control will bring a compatibility issue. This change is going to 
solve theseproblems. Please help review it. Thanks!

Bug: https://bugs.openjdk.java.net/browse/JDK-8025128
webrev: http://cr.openjdk.java.net/~dxu/8025128/webrev/ 
<http://cr.openjdk.java.net/%7Edxu/8025128/webrev/>

-Dan