src: shared: schedules: add missing includes to header

Needed for clang-tidy prep work, as it requires headers to work standalone
(which is useful anyway).

src/shared/schedules.h

@@ -13,6 +13,9 @@
 #ifndef __RC_SCHEDULES_H
 #define __RC_SCHEDULES_H
 
+#include <stdbool.h>
+#include <sys/types.h>
+
 void free_schedulelist(void);
 int parse_signal(const char *applet, const char *sig);
 void parse_schedule(const char *applet, const char *string, int timeout);