RFR: JDK-8154237: Compare script broken for windows native library deps comparison

[Erik Joelsson]

One of the things the build compare script looks at is the list of 
dependencies for each native library and executable. This comparison is 
currently broken on Windows.

I have verified that this patch actually compares the dependency output 
from dumpbin on Windows and that we still have a clean baseline with two 
consecutive builds on all platforms.

Bug: https://bugs.openjdk.java.net/browse/JDK-8154237
Webrev: http://cr.openjdk.java.net/~erikj/8154237/webrev.01/

/Erik