RFR: JDK-8191204 Post-consolidation cleaning up of the build system

[Magnus Ihse Bursie]

Erik reminded me off-list that the check for gtest source code could not 
be removed, due to the fact that Oracle, for historical reasons, 
generates "source bundles" with incomplete source trees, which e.g. are 
missing gtest. (And since gtest is built as part of the hotspot product, 
and not as a separate build step, it cannot be not built by just 
omitting a make target, so we must have this test.)

I reverted this part before checking in the patch, judging that no 
re-review was needed.

/Magnus

On 2017-11-14 12:17, Magnus Ihse Bursie wrote:
> I think this is the last round of the post-consolidation cleaning up 
> of the build system. I'm removing some now-redundant checks, aligning 
> to more common calling practice, and speeding up the hg status check 
> (which was becoming more urgent as the repo grow in size).
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8191204
> WebRev: 
> http://cr.openjdk.java.net/~ihse/JDK-8191204-post-consolidation-cleanup/webrev.01
>
> /Magnus