hg: build-infra/jdk9: Cleanup use of legacy JVM_VARIANT_*.

[magnus.ihse.bursie at oracle.com]

Changeset: d2dd5185d203
Author:    ihse
Date:      2016-02-09 22:38 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/d2dd5185d203

Cleanup use of legacy JVM_VARIANT_*.

! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! common/autoconf/hotspot-spec.gmk.in
! common/autoconf/lib-std.m4
! common/autoconf/libraries.m4
! common/autoconf/spec.gmk.in