Fix includes for alpine

--- a/src/test/tools/ctrld/ctrld.c
+++ b/src/test/tools/ctrld/ctrld.c
@@ -17,6 +17,7 @@
 #include <signal.h>
 #include <limits.h>
 #include <queue.h>
+#include <fcntl.h>
 #include <sys/types.h>
 #include <sys/file.h>
 #include <sys/types.h>