Review Request: 8005794: in new infra, how do we change java -version?

[Erik Joelsson]

Adding a configure parameter --with-user-release-suffix which acts as 
the USER_RELEASE_SUFFIX variable used to do. If build number isn't set 
or is set to b00, this gets added to the full version string, overriding 
the default value <username>_<timestamp>. It's also possible to override 
this variable directly (same name as before) on the make command line. 
The difference to the old build is that setting it in the environment 
isn't honored.

http://cr.openjdk.java.net/~erikj/8005794/webrev.root.01/