RFR: 8079203: aarch64: need to cater for different partner implementations

[Edward Nevill]

On Fri, 2015-05-01 at 09:40 -0700, Vladimir Kozlov wrote:
> Wow, dependence on cpuinfo format. We are struggling with PICL and KSTAT format versions on SPARC. I hope Linux have 
> more fixed cpuinfo format.
> 
> Should you add this info to _features_str?
> 

Good idea. This will be very useful for debugging those hs_err logs.

I have added this in the latest webrev

http://cr.openjdk.java.net/~enevill/8079203/webrev.01

The cpuinfo is just dumped in the features string as a sequence of hex
values. Eg

0x41:0x0:0xd03:0(0xd07), simd, crc, aes, sha1, sha256

Where the fields are

Implementer:Variant:Part:Revision(Part2)

Part2 is only printed in the case of a big little (hetrogeneous) system.

All the best,
Ed.