o Add modulo argument to sim_core_attach

o	Add sim-memopt module - memory option processing.

sim/common/sim-module.c

@@ -38,6 +38,10 @@ static MODULE_INSTALL_FN * const modules[] = {
   profile_install,
 #endif
   sim_core_install,
+#ifndef SIM_HAVE_FLATMEM
+  /* FIXME: should handle flatmem as well FLATMEM */
+  sim_memopt_install,
+#endif
   sim_events_install,
 #if WITH_WATCHPOINTS
   sim_watchpoint_install,