init: Move signal handling to signal_handler.c

Change-Id: I3a24afa28a1cd279c749d6f384f687b8de56067e
diff --git a/init/init.h b/init/init.h
index 8210238..4d0593d 100644
--- a/init/init.h
+++ b/init/init.h
@@ -157,6 +157,8 @@
 
 int parse_config_file(const char *fn);
 
+void notify_service_state(const char *name, const char *state);
+
 struct service *service_find_by_name(const char *name);
 struct service *service_find_by_pid(pid_t pid);
 struct service *service_find_by_keychord(int keychord_id);