openrc: rc-logger: add missing includes to header

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

src/openrc/rc-logger.h

@@ -13,6 +13,9 @@
 #ifndef RC_LOGGER_H
 #define RC_LOGGER_H
 
+#include <stdbool.h>
+#include <sys/types.h>
+
 extern pid_t rc_logger_pid;
 extern int rc_logger_tty;
 extern bool rc_in_logger;