hg: jdk/sandbox: 8217739: Cannot reuse java.base UnixConstants.java from target in BuildJDK when cross compiling

[chris.hegarty at oracle.com]

Changeset: f4b2d5b83ebf
Author:    erikj
Date:      2019-06-07 09:16 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/f4b2d5b83ebf

8217739: Cannot reuse java.base UnixConstants.java from target in BuildJDK when cross compiling
Reviewed-by: tbell, aoqi

- make/CreateBuildJdkCopy.gmk
! make/ExplodedImageOptimize.gmk
! make/Main.gmk
! make/autoconf/buildjdk-spec.gmk.in
! make/common/MakeBase.gmk
! make/common/NativeCompilation.gmk
! make/gensrc/GensrcMisc.gmk