Include cstdlib for timespec. Clang modules demands that. (google#353)

yasushi-saito · EricWF · commit f5ff6d0e0d3d · 2017-03-13T20:30:19.000-06:00
diff --git a/src/sleep.cc b/src/sleep.cc
@@ -15,6 +15,7 @@
 #include "sleep.h"
 
 #include <cerrno>
+#include <cstdlib>
 #include <ctime>
 
 #include "internal_macros.h"
