add the -- -std=c++11 flag

Author: pvdrz

tests/headers/noreturn.hpp

@@ -1,5 +1,4 @@
-// bindgen-flags: --enable-function-attribute-detection
+// bindgen-flags: --enable-function-attribute-detection -- -std=c++11
 _Noreturn void f(void);
-// TODO (pvdrz): figure out how to handle this case.
 __attribute__((noreturn)) void g(void);
 [[noreturn]] void h(void);