RFR(xs): 8075044 : Query dbghelp.dll version number at run time, not at compile time

[Thomas Stüfe]

Hi all,

please take a look at this tiny change:

webrev: http://cr.openjdk.java.net/~stuefe/webrevs/8075044/webrev.01/webrev/
bug: https://bugs.openjdk.java.net/browse/JDK-8075044

This changes the version number query for dbghelp.dll from a compile time
check to a run time check.

Thanks!

Thomas Stuefe