LWG Issue #2210 Part 5 - map/multimap; no, really - the last one was set/multiset. THIS is map/multimap

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@190474 91177308-0d34-0410-b5e6-96231b3b80d8
Adding bad_array_length to libc++

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@190478 91177308-0d34-0410-b5e6-96231b3b80d8