hg: build-infra/jdk9: Remove target/subtarget syntax.

[magnus.ihse.bursie at oracle.com]

Changeset: f7f0ddfb5d17
Author:    ihse
Date:      2015-01-16 15:21 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/f7f0ddfb5d17

Remove target/subtarget syntax.

! common/autoconf/generated-configure.sh
! make/Main.gmk
! make/MakeHelpers.gmk