Parallel builds of IcedTea/OpenJDK

[Joshua Sumali]

Andrew John Hughes wrote:
> The attach patch allows the ALT_PARALLEL_COMPILE_JOBS and
> HOTSPOT_BUILD_JOBS options to be turned on for an IcedTea build using
> --with-parallel-jobs=x where x is the number of jobs to use.  This
> speeds up the build quite a bit on systems with more than one
> processor.
>
> I've tested a full bootstrap with this.  Okay to commit?
>
>   
Out of curiosity, what's a good number to use for x? I have a dual core 
machine at home, if that helps.

Josh