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

[Magnus Ihse Bursie]

LGTM. 

/Magnus

> 6 nov. 2018 kl. 19:04 skrev Erik Joelsson <erik.joelsson at oracle.com>:
> 
> 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
> 
> /Erik
>