test: add -std=c++11

This test uses C++11 features (r-value references) in ObjC++.  Add a -std=c++11
to silence a warning.  NFC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220586 91177308-0d34-0410-b5e6-96231b3b80d8
CodeGen: trivial conversion to range based loop

Switch to a range-based for loop.  NFC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220587 91177308-0d34-0410-b5e6-96231b3b80d8