hg: build-infra/jdk9: Create diz files with -1 (maximum speed), typically results in zip times on

[magnus.ihse.bursie at oracle.com]

Changeset: 0d805766ac11
Author:    ihse
Date:      2015-01-27 01:11 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/0d805766ac11

Create diz files with -1 (maximum speed), typically results in zip times on
< 50% of default (-6) but only 14% larger files (260 instead of 230 MB for
libjvm.diz).

! make/common/NativeCompilation.gmk