[PATCH v3 4/4] Add testcases to break.exp

[Joel Brobecker]

>     add testcases to break.exp as follows:
>     *break with non-existed condition
>     *break with out-ou-ranged address
>     *break at offset -1
> 
> gdb/testsuite/ChangeLog:
> 
>     * gdb.base/break.exp: Add new testcases.

Same comments as before...
The changes themselves look OK to me.

-- 
Joel