RFR(XS) [8u] Fixed build issues on Windows

[Roman Kennke]

Am 25.07.2017 um 19:45 schrieb Zhengyu Gu:
> Fixed a couple of missing precompiled headers.
>
>
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/jdk8u-build/webrev.00/
>
> Thanks,
>
> -Zhengyu

Yup