minor change in ld --gc-sections test

[Benjamin Kosnik]

err. That test is in there to make sure that --gc-sections is working. 
Remember, that .eh_frame was getting thrown away arbitrarily? 

What's the output of this test?


>      int main(void)
>      {
>         try { throw 1; }
>         catch (...) { };
>         return 0;
>      }