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/SourcePos.cpp b/tools/localize/SourcePos.cpp
index 9d7c5c6..dd54f3a 100644
--- a/tools/localize/SourcePos.cpp
+++ b/tools/localize/SourcePos.cpp
@@ -2,6 +2,7 @@
 
 #include <stdarg.h>
 #include <set>
+#include <cstdio>
 
 using namespace std;