[liblang] Handle CXXForRangeStmt during AST visitation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221874 91177308-0d34-0410-b5e6-96231b3b80d8
[libclang] Make sure to visit the body of a CXXForRangeStmt.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221881 91177308-0d34-0410-b5e6-96231b3b80d8