Code review request: 7152671,RFE: Windows decoder should add some std dirs to the symbol search path

[Zhengyu Gu]

This is an enhancement that allows Windows decoder to search pdb files 
that are created by FDS.

In short, if FDS pdb files are downloaded into following paths, Widnows 
decoder should be able to use them to decode stacks:

$JDK/lib
$JRE/lib
directory where jvm.dll is loaded from.  ($JRE/bin/{server or client})


http://cr.openjdk.java.net/~zgu/7152671/webrev.01/


Thanks,

-Zhengyu