RFR: Make -target 8 in javac generate version 52.0 classfile

[Kumar Srinivasan]

Hi J&J,

* Fixed comment in Target.java
* Added Bug-id to the relevant tests
* Updated CR in test.sh and adjusted test.sh to test all
   possible and valid combinations for source and target

Webrev:
http://cr.openjdk.java.net/~ksrini/8001112/webrev.1/

For changes since the last reviewed version:
http://cr.openjdk.java.net/~ksrini/8001112/webrev.1/webrev.delta/index.html

Thanks
Kumar



> Hello Jon, et. al.,
>
> This is the change to increment class files major number
> generated by  javac, in preparation for the incoming JSRs.
>
> http://cr.openjdk.java.net/~ksrini/8001112/webrev.0/
>
> check.sh contains a set -x, I can rip it out if you think I must.
>
> Thanks
> Kumar
>