Implement LWG Issue #2285 - make_reverse_iterator. Also mark issues #1450 and #2205 as complete; they are just wording changes in the standard. Mark issues #2359, #2320 and #2322 as complete - libc++ implements them already.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@202671 91177308-0d34-0410-b5e6-96231b3b80d8