-do not run epoll tests if epoll was disabled, even on linux

src/testcurl/https/test_https_get_select.c

@@ -221,7 +221,7 @@ main (int argc, char *const *argv)
       fprintf (stderr, "Error: %s\n", strerror (errno));
       return -1;
     }
-#if LINUX
+#if EPOLL_SUPPORT
   if (0 != (errorCount = testExternalGet (MHD_USE_EPOLL_LINUX_ONLY)))
     fprintf (stderr, "Fail: %d\n", errorCount);
 #endif