Add missing includes.

Change-Id: I06ea08400efa511e627be37a4fd70fbdfadea2e6
diff --git a/minui/events.c b/minui/events.c
index df7dad4..d98a774 100644
--- a/minui/events.c
+++ b/minui/events.c
@@ -16,6 +16,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include <dirent.h>
 #include <sys/epoll.h>