Documentation comment parsing: allow \param and \returns on std::function,
boost::function and similar function-like objects


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197528 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation comment parsing: when checking if we have typedef to something
that we consider a function for the purposes of checking \param and \returns,
look through reference types.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197530 91177308-0d34-0410-b5e6-96231b3b80d8
Objctive-C. warn if dealloc is being overridden in
a category implementation. // rdar://15397430


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197534 91177308-0d34-0410-b5e6-96231b3b80d8