RFR: 8203227: Introduce os::processor_id() for Linux and Solaris

[Robbin Ehn]

> 
> Here's an updated webrev for continued discussion:
> 
> http://cr.openjdk.java.net/~pliden/8203227/webrev.1

Looks good, Robbin

> 
> cheers,
> Per
> 
>>
>> Thanks,
>> David
>>
>>> /Per