Coverage mapping: fix mapping for objective-c message expression

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216081 91177308-0d34-0410-b5e6-96231b3b80d8
Coverage mapping: fix mapping for objective-c for statement

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216082 91177308-0d34-0410-b5e6-96231b3b80d8