[python] Run tests for c++ with std=c++11


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156008 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/bindings/python/tests/cindex/util.py b/bindings/python/tests/cindex/util.py
index 388b269..f924094 100644
--- a/bindings/python/tests/cindex/util.py
+++ b/bindings/python/tests/cindex/util.py
@@ -15,16 +15,17 @@
     all_warnings is a convenience argument to enable all compiler warnings.
     """
     name = 't.c'
+    args = []
     if lang == 'cpp':
         name = 't.cpp'
+        args.append('-std=c++11')
     elif lang == 'objc':
         name = 't.m'
     elif lang != 'c':
         raise Exception('Unknown language: %s' % lang)
 
-    args = []
     if all_warnings:
-        args = ['-Wall', '-Wextra']
+        args += ['-Wall', '-Wextra']
 
     index = Index.create()
     tu = index.parse(name, args=args, unsaved_files=[(name, source)])