hg: jdk9/sandbox: 8146638: Only use compiler option files if they are really supported by the toolchain

[chris.hegarty at oracle.com]

Changeset: f0117f6e5234
Author:    simonis
Date:      2016-01-08 09:46 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/f0117f6e5234

8146638: Only use compiler option files if they are really supported by the toolchain
Reviewed-by: erikj

! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! make/common/NativeCompilation.gmk