src/Makefile.am: add ref to new sched_policies/detect_combined_workers.h file

src/Makefile.am

@@ -69,6 +69,7 @@ noinst_HEADERS = 						\
 	core/errorcheck.h					\
 	core/combined_workers.h					\
 	core/parallel_task.h					\
+	sched_policies/detect_combined_workers.h		\
 	sched_policies/fifo_queues.h				\
 	sched_policies/deque_queues.h				\
 	sched_policies/stack_queues.h				\