hg: build-infra/jdk9: BUILD_SYSROOT_*FLAGS should be set to SYSROOT_*FLAGS on all platforms when not cross compiling

[erik.joelsson at oracle.com]

Changeset: f046dab403c3
Author:    erikj
Date:      2015-10-01 10:08 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/f046dab403c3

BUILD_SYSROOT_*FLAGS should be set to SYSROOT_*FLAGS on all platforms when not cross compiling

! common/autoconf/generated-configure.sh
! common/autoconf/toolchain.m4