RFR: 8024815: jdk8-build nightly builds are failing on windows with configure: error: unrecognized options: --with-dxsdk

[Erik Joelsson]

When removing --with-dxsdk, we forgot about backwards compatibility. 
When removing configure options, we need to leave them along as noops 
for a time to allow for users of the configure API time to change.

http://cr.openjdk.java.net/~erikj/8024815/webrev.root.01/
/Erik