Added mintty/msvcrt fix to events test.

tests/events.c

@@ -417,8 +417,13 @@ int main(void)
     printf("Main loop starting\n");
 
     while (!glfwWindowShouldClose(window))
+    {
         glfwWaitEvents();
 
+        // Workaround for an issue with msvcrt and mintty
+        fflush(stdout);
+    }
+
     glfwTerminate();
     exit(EXIT_SUCCESS);
 }