timed_semaphore: fix deprecated warning

Fixes #2429

repos/base/src/lib/ldso/main.cc

@@ -19,6 +19,7 @@
 #include <util/string.h>
 #include <base/thread.h>
 #include <base/heap.h>
+#include <os/timed_semaphore.h>
 
 /* base-internal includes */
 #include <base/internal/unmanaged_singleton.h>
@@ -679,6 +680,9 @@ void Component::construct(Genode::Env &env)
 
 	Link_map::dump();
 
+	/* FIXME: remove 'Timeout_thread' from the base library */
+	Timeout_thread::env(env);
+
 	binary_ready_hook_for_gdb();
 
 	/* start binary */