Fix missing #includes in system/core.
Change-Id: I4736e8c4f7bb8bb03640d26d58243efaa67dc75c
diff --git a/toolbox/ps.c b/toolbox/ps.c
index 4f001b8..7d6dfa0 100644
--- a/toolbox/ps.c
+++ b/toolbox/ps.c
@@ -1,15 +1,13 @@
+#include <ctype.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
-#include <ctype.h>
-#include <fcntl.h>
-
#include <string.h>
-
#include <sys/stat.h>
#include <sys/types.h>
-#include <dirent.h>
-
-#include <pwd.h>
+#include <unistd.h>
#include <cutils/sched_policy.h>