RFR 8030011: Update Hotspot version string output

[John Coomes]

Alejandro E Murillo (alejandro.murillo at oracle.com) wrote:
> ...
> I think I incorporated all the changes David, John and you suggested and 
> started some sanity testing;
> Here's is the latest webrev:
> 
> http://cr.openjdk.java.net/~amurillo/9/8030011/
> 
> Please review (don't forget to refresh each file on your browser) and 
> let me know if I missed anything.
> thanks guys!

Looks good.  Might be nice to shorten the rest of the assert messages
in vm_version.cpp to match the one for the build number, e.g., "bad
major version").

-John