Make roll.c compile without warnings in fedora core 8. Addresses #27.

git-svn-id: file:///svn/tokudb@1735 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/roll.c

@@ -5,6 +5,7 @@
 
 #include <stdlib.h>
 #include <inttypes.h>
+#include <unistd.h>
 
 #include "log_header.h"
 #include "log-internal.h"