Mark some of the behavior in the move w/allocator constructors of deque/unordered containers as 'libc++-specific'. Thanks to Andrey Maksimov for pointing this out.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@352512 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed