Ongoing work for adding per-thread UTCB structures.

Added setting of utcb address to l4_thread_control.
This is going to be moved to exchange_registers() since we need to pass
both the utcb physical and virtual address and exregs fits such context
modification better than thread_control.

tasks/fs0/container.c

@@ -0,0 +1,23 @@
+/*
+ * Container entry point for this task
+ *
+ * Copyright (C) 2007-2009 Bahadir Bilgehan Balban
+ */
+#include <posix/posix_init.h>
+#include <l4lib/init.h>
+#include <l4lib/utcb.h>
+
+void main(void);
+
+void __container_init(void)
+{
+	/* Generic L4 thread initialisation */
+	__l4_init();
+
+	/* FS0 posix-service initialisation */
+	posix_service_init();
+
+	/* Entry to main */
+	main();
+}
+