[committed][gdb/testsuite] Make gdb.base/dbx.exp more robust

[Pedro Alves]

On 6/11/20 1:11 PM, Tom de Vries wrote:
> [ was: Re: [PATCH 3/3][gdb/testsuite] Warn about leaked global array ]
> 
> On 04-06-2020 13:40, Tom de Vries wrote:
>>> BTW, global variables alone aren't the full scope of the
>>> bleeding between testcases.  There's also the case of
>>> testcases overriding procedures, like gdb.base/dbx.exp,
>>> but those are perhaps rare enough that we can continue
>>> handling it "manually" as before.
>> AFAICT, that test-case does an effort to undo the override, though I'm
>> not sure how certain it is that the undo will be executed.
> 
> I've committed patch below to make sure the undo is executed (and
> similar for GDBFLAGS).

Nice.

Thanks,
Pedro Alves