RFR: JDK-8213428: Add a no preocmpiled header Linux build to builds-tier1 and jdk-submit

[Tim Bell]

Erik:

> A recent discussion on build-dev brought out the need for jdk-submit to
> include a build with precompiled headers disabled. We currently have
> such builds in builds-tier2, which is not part of jdk-submit. In tier2
> now, we actually build all slowdebug builds without pch, which is
> overkill on platform coverage and not as useful as fastdebug builds.
>
> My suggestion is then to add a specialized linux build of just hotspot,
> fastdebug and disabled pch to builds-tier1 and remove the disabling of
> pch on the slowdebug builds in tier2.
>
> This open part adds the specialized build config to the jib configuration.
>
> Webrev: http://cr.openjdk.java.net/~erikj/8213428/webrev.01/
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8213428

Looks good.

Tim