[patch/rfa] Test java's "break main"

[Andrew Cagney]

Hello,

This tests the ability to set a breakpoint on "main" in Java.  It tries 
three alternatives:

(gdb) break main
(gdb) break jmain.main
(gdb) break jmain.main(...)

at present only the third works.  The others are KFAILed as they involve 
changes to both gcj and gdb.

comments, ok?
Andrew