<Swing Dev> [10] RFR 6962725:Regtest javax/swing/JFileChooser/6738668/bug6738668.java fails under Linux

[Sergey Bylokhov]

Hi, Prasanta.
Please confirm that the updated test fails before JDK-6738668 was fixed.

> 
> Hi ALl,
> 
> Please review a testbug fix for an issue where this regression test is failing in linux because
> JFileChooser was trying to access C:/temp path which does not exist in linux.
> 
> Proposed fix is to use java.io.tmpdir instead of hardcoded windows path.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-6962725
> webrev: http://cr.openjdk.java.net/~psadhukhan/6962725/webrev.00/
> 
> Regards
> Prasanta