hg: build-infra/jdk9/hotspot: 2 new changesets

[magnus.ihse.bursie at oracle.com]

Changeset: d7d97433e76f
Author:    ihse
Date:      2015-09-28 21:35 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk9/hotspot/rev/d7d97433e76f

Remove hardcoded "jprtadm".

! makefiles/Common.gmk

Changeset: 63edbfec5a0d
Author:    ihse
Date:      2015-09-28 21:36 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk9/hotspot/rev/63edbfec5a0d

Allow overriding of HOTSPOT_BUILD_USER.

! makefiles/CompileJvm.gmk