C++11: If a class has a user-declared copy operation or destructor, the
implicit definition of a copy operation is deprecated. Add a warning for this
to -Wdeprecated. This warning is disabled by default for now, pending
investigation into how common this situation is.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183884 91177308-0d34-0410-b5e6-96231b3b80d8