RFR: 8146985: Change output directory for hotspot's jtreg tests

[Erik Helin]

Hi all,

I have updated the patch based on feedback and comments.
hotspot/test/Makefile is now aligned with jdk/test/Makefile and now
stores the ouput from the jtreg tests in:
  <top-level>/build/<conf>/testoutput/<jtreg-group>
Since the jtreg groups are prefixed with the name of the repository,
e.g. hotspot_svc, jdk_svc, there won't be any name clashes.

Webrev:
http://cr.openjdk.java.net/~ehelin/8146985/01/

Testing:
- Running `make test-hotspot-jtreg` and verified that is uses the
  correct directory for test output.
- Running JPRT and verified that it works with the new directory name.
  Since JPRT does not use ALT_OUTPUTDIR, the output will be stored in
    build/<os>-<arch>/testoutput/<jtreg-group>
  which JPRT seems to handle just fine.

Thanks,
Erik

On 2016-01-13, Erik Helin wrote:
> Hi all,
> 
> this patch changes the output directory for hotspot's jtreg tests when
> run via the top-level Makefile targets such as
> `make test-hotspot-jtreg`.
> 
> The current directory is
> <top-level>/build/<conf>/hotspot/linux-x64/testoutput
> (on an x86-64 machine running Linux). There is no need to place the
> "testoutput" directory in a directory which name is based on OS and arch,
> that is already done by the current configuration. Therefore, we can
> instead place the "testoutput" directory in
> <top-level>/build/<conf>/hotspot/, which is a more reasonable location
> for the output from hotspot's tests.
> 
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8146985
> 
> Webrev:
> http://cr.openjdk.java.net/~ehelin/8146985/00/webrev
> 
> Testing:
> - Running `make test-hotspot-jtreg` locally
> - JPRT (the patch does not affect JPRT since JPRT does not use
>   ALT_OUTPUTDIR)
> 
> Thanks,
> Erik