use std::unique_ptr instead of std::auto_ptr with C++11+ compilers to prevent std::auto_ptr deprecation warnings

CppUnit/include/CppUnit/TestCaller.h

@@ -81,7 +81,11 @@ protected:
 
 private:
 	TestMethod             _test;
+#if __cplusplus < 201103L
 	std::auto_ptr<Fixture> _fixture;
+#else
+	std::unique_ptr<Fixture> _fixture;
+#endif
 };