PR21145: Teach LLVM about C++14 sized deallocation functions.

C++14 adds new builtin signatures for 'operator delete'. This change allows
new/delete pairs to be removed in C++14 onwards, as they were in C++11 and
before.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219014 91177308-0d34-0410-b5e6-96231b3b80d8
Add a reference to Phabricator.rst to docs/index.rst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219015 91177308-0d34-0410-b5e6-96231b3b80d8