RFR: 8028479: runNameEquals still cannot precisely detect if a usable native krb5 is available

[Weijun Wang]

Please take a look at

   http://cr.openjdk.java.net/~weijun/8028479/webrev.00/

The fix includes 2 parts:

1. krb5-config not checking gssapi. This does not work on Solaris. Only 
krb5 is available there. With an argument, a default will be used 
(usually krb5).

2. A 64-bit Linux might only have 64-bit native lib installed but 32-bit 
JRE cannot use it. krb5-config cannot tell the bitness.

Thanks
Max