[analyzer] Switched to checkPreCall interface for detecting usage after free.

Now the check is also applied to arguments for Objective-C method calls and to 'this' pointer.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179230 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed