KeychainAPI checker: Add basic diagnostics. Track MemoryRegion istead of SymbolicRef since the address might not be a symbolic value in some cases, for example in fooOnlyFree() test.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136851 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed