Fix tree containers debug mode C++11 allocator awareness

[François Dumont]

Hi

     Here is a patch to fix tests regarding newly introduce C++ 
allocator awareness of associative containers in debug mode.

     Note that doing so I realize that what was done in allocator aware 
move constructors is not perfectly correct and I will submit another 
patch later.

     I am not sure about to write ChangeLog for this without too many 
repetition, here is a try:

2013-12-17  François Dumont  <fdumont@gcc.gnu.org>

     * include/debug/set.h (set): Implement C++11 allocator-aware
     container requirements.
     * include/debug/map.h (map): Likewise.
     * include/debug/multiset.h (multiset): Likewise.
     * include/debug/multimap.h (multimap): Likewise.
     * include/debug/set.h (set::operator=(set&&)): Add noexcept and
     fix implementation regarding management of safe iterators.
     * include/debug/map.h (map::operator=(map&&)): Likewise.
     * include/debug/multiset.h (multiset::operator=(multiset&&)): Likewise.
     * include/debug/multimap.h (multimap::operator=(multimap&&)):
     Likewise.
     * include/debug/set.h (set::operator=(std::initializer_list<>)):
     Use normal equivalent operator.
     * include/debug/map.h (map::operator=(std::initializer_list<>)):
     Likewise.
     * include/debug/multiset.h
     (multiset::operator=(std::initializer_list<>)): Likewise.
     * include/debug/multimap.h
     (multimap::operator=(std::initializer_list<>)): Likewise.
     * include/debug/set.h (set::swap(set&)): Add noexcept
     specification, add allocator equility check.
     * include/debug/map.h (map::swap(map&)): Likewise.
     * include/debug/multiset.h (multiset::swap(multiset&)): Likewise.
     * include/debug/multimap.h (multimap::swap(multimap&)): Likewise.

Tested under Linux x86_64 normal and debug modes.

Ok to commit ?

François

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