Added stubs for the kernel memory manager

vm/vm_bootstrap.c

@@ -0,0 +1,6 @@
+#include <socks/status.h>
+
+kern_status_t vm_bootstrap(void)
+{
+	return KERN_ERR_UNIMPLEMENTED;
+}

vm/vm_map.c

@@ -0,0 +1,7 @@
+#include <socks/vm.h>
+#include <stddef.h>
+
+vm_map_t *vm_map_create(void)
+{
+	return NULL;
+}

vm/vm_object.c

@@ -0,0 +1,7 @@
+#include <socks/vm.h>
+#include <stddef.h>
+
+vm_object_t *vm_object_create(void)
+{
+	return NULL;
+}

vm/vm_page.c

@@ -0,0 +1,6 @@
+#include <socks/vm.h>
+
+void vm_page_init(vm_page_t *page)
+{
+
+}