hg: jdk/submit: 8210988: Improved handling of compiler warnings in the build

[magnus.ihse.bursie at oracle.com]

Changeset: ab54a4d61d7f
Author:    ihse
Date:      2018-09-21 21:35 +0200
URL:       http://hg.openjdk.java.net/jdk/submit/rev/ab54a4d61d7f

8210988: Improved handling of compiler warnings in the build
Reviewed-by: erikj

! make/autoconf/flags-cflags.m4
! make/autoconf/flags-ldflags.m4
! make/autoconf/spec.gmk.in
! make/common/NativeCompilation.gmk
! make/hotspot/lib/CompileGtest.gmk
! make/hotspot/lib/CompileJvm.gmk