[PATCH] Make fio build again on "crippled" platforms

Some time in the future we want a proper configure setup and only
install the supported io engines, for now install limited versions
that just complain on initialization.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index 53e174e..2e51da3 100644
--- a/fio.h
+++ b/fio.h
@@ -10,6 +10,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <string.h>
 
 #include "list.h"
 #include "md5.h"