Make memarea use smartlist_core, not container.

src/lib/memarea/.may_include

 orconfig.h
 lib/arch/*.h
 lib/cc/*.h
-lib/container/*.h
 lib/log/*.h
 lib/malloc/*.h
 lib/memarea/*.h
+lib/smartlist_core/*.h
\ No newline at end of file

src/lib/memarea/memarea.c

@@ -16,7 +16,8 @@
 
 #include "lib/arch/bytes.h"
 #include "lib/cc/torint.h"
-#include "lib/container/smartlist.h"
+#include "lib/smartlist_core/smartlist_core.h"
+#include "lib/smartlist_core/smartlist_foreach.h"
 #include "lib/log/log.h"
 #include "lib/log/util_bug.h"
 #include "lib/malloc/malloc.h"