Need official reviewers: hotspot makefile changes from build-infra

[Kelly O'Hair]

These will be integrated into the hotspot-rt forest at http://hg.openjdk.java.net/hsx/hotspot-rt/hotspot/

8000990: Improve logging in hotspot repo builds for new build-infra

http://cr.openjdk.java.net/~ohair/jdk8/hotspot.build.infra.logging/webrev/

I did not make these changes, so I'd like to create this changeset with an appropriate owner and list of
reviewers (which I will be one).
If there are issues to resolve with these changes, it would be best if that appropriate owner made the changes
in the build-infra forest and I will re-generate the patch.

-kto