Need reviewer: build-infra makefile changes

[Kelly O'Hair]

No impact to the current makefiles.

This is changes for the new build-infra makefiles.

I'm sure there is more to come.

Thanks to Erik, Magnus, Fredrik, and Jonas.  If I missed anyone else that has contributed on this, my apologies.

7170079: Adjustments to build-infra makefiles
http://cr.openjdk.java.net/~ohair/openjdk8/build-infra2/webrev/

-kto