Some of the synopsis was left out of these headers, and the copy construction/assignment should have been marked as deleted. Done. No functionality change, because the base class (base_ios) was marked as non-copyable already.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217876 91177308-0d34-0410-b5e6-96231b3b80d8
Forgot 'const' on my last checkin

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217877 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a bad noexcept clause in tuple's move constructor

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217878 91177308-0d34-0410-b5e6-96231b3b80d8