Add missing includes.

Change-Id: I06ea08400efa511e627be37a4fd70fbdfadea2e6
diff --git a/minui/resources.c b/minui/resources.c
index 2bae4de..f645c4b 100644
--- a/minui/resources.c
+++ b/minui/resources.c
@@ -15,6 +15,7 @@
  */
 
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include <fcntl.h>