PATCH RFA: Do not build java by default

[Joern Rennecke]

Quoting Geert Bosch <bosch@adacore.com>:

> On Nov 1, 2010, at 00:30, Joern Rennecke wrote:
>> But to get that coverage, testers will need to have gnat installed.
>> Will that become a requirement for middle-end patch regression testing?
>
> No, the language will only be built if a suitable bootstrap compiler
> is present.

I know that.  My question was aimed at soliciting opinions on patch
submission policy in the case that libjava build & testing are dropped
from standard bootstrap tests.