Make test compile on older compilers.

format_test.cc

@@ -718,10 +718,10 @@ TEST(ActiveFormatterTest, ActionNotCalledOnError) {
   EXPECT_EQ(0, num_calls);
 }
 
-// The test doesn't compile on MSVC because the latter follows C++03 and
-// requires an accessible copy ctor when binding a temporary to a const
+// The test doesn't compile on older compilers which follow C++03 and
+// require an accessible copy ctor when binding a temporary to a const
 // reference.
-#ifndef _MSC_VER
+#if __GNUC__ >= 4 && __GNUC_MINOR__ >= 7
 TEST(ActiveFormatterTest, ArgLifetime) {
   // The following code is for testing purposes only. It is a definite abuse
   // of the API and shouldn't be used in real applications.