[analyzer] Tests for intersections with other checkers from MallocChecker.cpp factored out to  NewDelete-intersections.mm

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178387 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Enabled unix.Malloc checker.
+ Refactoring.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178388 91177308-0d34-0410-b5e6-96231b3b80d8