localize: include <cstdio> in files that uses the printf family of
functions to make the code build on gcc-4.4

gcc-4.4 further cleaned up header include dependencies so that e.x.
including <iostream> no longer pulls in printf.
diff --git a/tools/localize/file_utils.h b/tools/localize/file_utils.h
index 3b3fa21..7706587 100644
--- a/tools/localize/file_utils.h
+++ b/tools/localize/file_utils.h
@@ -4,6 +4,7 @@
 #include "ValuesFile.h"
 #include "Configuration.h"
 #include <string>
+#include <cstdio>
 
 using namespace std;