Test container type is added.

Test container is planned to test codezero microkernel extensively.
With these changes, everything is there to develop a full-featured test suite.
It also exemplifies how a new container type can be added to the system.
(cherry picked from commit f21fa53df421bfc8eeeaa096c89b98beed436c60)

conts/test/container.c

@@ -0,0 +1,21 @@
+/*
+ * Container entry point for pager
+ *
+ * Copyright (C) 2007-2009 B Labs Ltd.
+ */
+
+#include <l4lib/init.h>
+#include <l4lib/utcb.h>
+
+
+void main(void);
+
+void __container_init(void)
+{
+	/* Generic L4 initialisation */
+	__l4_init();
+
+	/* Entry to main */
+	main();
+}
+