libstdc++ support for m68k

[Sebastian Huber]

Hello,

I was a bit surprised to find this special case for RTEMS in libstdc++ 
on m68k:

https://gcc.gnu.org/ml/libstdc++/2016-09/msg00017.html

Any objections to eliminate this special case and simply use the generic 
implementation? We have to check if the atomic operations for our m68k 
(or ColdFire) targets really work and if the libatomic is used 
appropriately.

-- 
Sebastian Huber, embedded brains GmbH

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