RFR: [10] Backports for fixing Shenandoah JDK10 non-PCH build

[Aleksey Shipilev]

On 03/13/2018 09:24 PM, Zhengyu Gu wrote:
> A couple of backports to fix Shenandoah JDk10 build without precompiled headers.
> 
> Both patches were applied cleanly.
> 
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/sh-jdk10-non-PCH/webrev.00/

*) I would prefer not to pickup partial backports that fix PCH for us. Is there a way to just add
appropriate headers to make it compile?

*) The code move for SBS::clone_in_heap should be done in sh/jdk, and then backported to sh/jdk10.
Maybe you would like to RFR that first, then we backport, and then we finish fixing PCH in sh/jdk10.

Thanks,
-Aleksey