hg: jdk9/sandbox: 8143141: Bring in minor build changes from the jigsaw/jake forest

[chris.hegarty at oracle.com]

Changeset: b2a9c5ef147e
Author:    erikj
Date:      2015-11-24 15:46 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/b2a9c5ef147e

8143141: Bring in minor build changes from the jigsaw/jake forest
Reviewed-by: ihse, mchung

! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! common/autoconf/spec.gmk.in
! common/autoconf/toolchain.m4
! make/CompileJavaModules.gmk
! make/Images.gmk
! make/Jprt.gmk
! make/Main.gmk
! make/common/JavaCompilation.gmk
! make/common/NativeCompilation.gmk