Lots of hacking to make a very simple "ls" utility.

I added a dead-simple malloc that only allows allocations < 4096 bytes.
It just forwards the request to mmap() every time.

I also added simplified versions of opendir() and readdir().

LibC/stdlib.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "types.h"
+
+extern "C" {
+
+void* malloc(size_t);
+void free(void*);
+
+}
+