[Test] Fix test file for C++98 mode

llvm-svn: 344762

clang/test/SemaCXX/enum.cpp

@@ -105,10 +105,12 @@ void PR8089() {
 
 // This is accepted as a GNU extension. In C++98, there was no provision for
 // expressions with UB to be non-constant.
-enum { overflow = 123456 * 234567 }; // expected-warning {{overflow in expression; result is -1106067520 with type 'int'}}
+enum { overflow = 123456 * 234567 };
 #if __cplusplus >= 201103L
 // expected-warning@-2 {{not an integral constant expression}}
 // expected-note@-3 {{value 28958703552 is outside the range of representable values}}
+#else 
+// expected-warning@-5 {{overflow in expression; result is -1106067520 with type 'int'}}
 #endif
 
 // PR28903