RFR: Fix Shenandoah non-PCH build

[Zhengyu Gu]

On 08/20/2018 09:03 AM, Aleksey Shipilev wrote:
> On 08/20/2018 02:57 PM, Zhengyu Gu wrote:
>> Non-PCH build broke again.
>>
>> http://cr.openjdk.java.net/~zgu/shenandoah/sh-non-pch/webrev.00/index.html
> 
> Looks good.
> 
> That's it? I thought we get more failures without this one:
>    https://bugs.openjdk.java.net/browse/JDK-8209647

Hummm ... did not show up on my builds, don't know why.

-Zhengyu
> 
> -Aleksey
>