Headers: Add support for ISO9899:2011 rsize_t.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179427 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Enable NewDelete checker if NewDeleteLeaks checker is enabled.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179428 91177308-0d34-0410-b5e6-96231b3b80d8