[demangler] Fix nested generic lambda

[Pedro Alves]

On 09/15/2017 05:15 PM, Pedro Alves wrote:
> On 09/15/2017 01:04 PM, Nathan Sidwell wrote:
>>
>>
>> Pedro, would you like me to port to gdb's libiberty, or will you do a
>> merge in the near future?
> 
> I wasn't planning to, but I'm doing it now.
> 

Now done:
 https://sourceware.org/ml/gdb-patches/2017-09/msg00421.html

> Thanks much for the fix!

Thanks,
Pedro Alves