RFR: JDK-8074016 Add convenient way of adding custom test targets to hotspot's test makefile

[Staffan Larsen]

Looks good!

Thanks,
/Staffan

> On 27 apr 2015, at 12:25, Ingemar Aberg <ingemar.aberg at oracle.com> wrote:
> 
> Please review this small fix to hotspot's test makefile
> 
> The file hotspot/test/Makefile provides '-include $(ALT_MAKE)/Makefile' close to the top (before most variables are set).
> Move that line to after the variables are defined so they are available to the custom makefile.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8074016
> 
> Webrev: http://cr.openjdk.java.net/~sla/iaberg/8074016/webrev.00/
> 
> /Ingemar