hg: jdk9/dev: 8065913: Various improvements in SetupNativeCompilation

[magnus.ihse.bursie at oracle.com]

Changeset: d52ae6b38836
Author:    ihse
Date:      2014-11-26 15:14 +0100
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/d52ae6b38836

8065913: Various improvements in SetupNativeCompilation
Reviewed-by: erikj

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