hg: jigsaw/jake: Replace jmod --os-name/--os-arch option with --target-platform

[mandy . chung]

Changeset: 7e790234d48f
Author:    mchung
Date:      2017-04-26 19:28 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jake/rev/7e790234d48f

Replace jmod --os-name/--os-arch option with --target-platform

! common/autoconf/generated-configure.sh
! common/autoconf/platform.m4
! common/autoconf/spec.gmk.in
! make/CreateJmods.gmk