[PATCH][_GLIBCXX_DEBUG] Enhance std::erase_if for vector/deque

[François Dumont]

I tried to use the same approach I used for node based containers but 
got ambiguity on erase calls. I think this simple version will do the work.

     libstdc++: [_GLIBCXX_DEBUG] Enhance std::erase_if for vector/deque

     libstdc++-v3/ChangeLog:

             * include/std/deque (erase_if): Use _GLIBCXX_STD_C 
container reference and
             __niter_wrap to limit _GLIBCXX_DEBUG mode impact.
             * include/std/vector (erase_if): Likewise.

Tested under Linux x86_64 normal and _GLIBCXX_DEBUG modes.

Ok to commit ?

François

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