hg: jdk9/dev: 8034788: Rewrite toolchain.m4 to support multiple toolchains per platform.

[magnus.ihse.bursie at oracle.com]

Changeset: b18872ff5379
Author:    ihse
Date:      2014-02-24 12:16 +0100
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/b18872ff5379

8034788: Rewrite toolchain.m4 to support multiple toolchains per platform.
Reviewed-by: henryjen, erikj

! common/autoconf/basics.m4
! common/autoconf/build-performance.m4
! common/autoconf/configure
! common/autoconf/configure.ac
+ common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! common/autoconf/help.m4
! common/autoconf/hotspot-spec.gmk.in
! common/autoconf/jdk-options.m4
! common/autoconf/libraries.m4
! common/autoconf/spec.gmk.in
! common/autoconf/toolchain.m4
! make/Main.gmk
! make/common/NativeCompilation.gmk