[analyzer] Leaks should be uniqued by the allocation point in the
closest function context. 

This prevents us from uniqueing all leaks from the same allocation
helper. radar://10932226

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151592 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed