Adaptation to init refactoring

Since init no longer provides public headers, we have to adjust the
existing users of this headers. The 'init/child_config.h' is used only
by GDB monitor. So the patch moves the header there as an interim fix.
The 'init/child_policy.h' is still used by a few components, so we have
to keep a trimmed-down version of it for now.

repos/demo/include/launchpad/launchpad.h

@@ -19,12 +19,15 @@
 #ifndef _INCLUDE__LAUNCHPAD__LAUNCHPAD_H_
 #define _INCLUDE__LAUNCHPAD__LAUNCHPAD_H_
 
+#include <util/xml_node.h>
 #include <base/allocator.h>
 #include <base/service.h>
 #include <base/lock.h>
+#include <base/child.h>
 #include <timer_session/timer_session.h>
 #include <pd_session/client.h>
-#include <init/child.h>
+#include <init/child_policy.h>
+#include <os/session_requester.h>
 
 class Launchpad;