grxmlcompile: include <cstdio> in files that wants netw_arc.h
to make the code build on gcc-4.4.

NUANArc::Print{,Text} in netw_arc.h uses 'printf' which is no longer
implicitly pulled in by <iostream> in gcc >= 4.4.
diff --git a/tools/grxmlcompile/gr_iface.cpp b/tools/grxmlcompile/gr_iface.cpp
index e6a37c7..5667ea9 100644
--- a/tools/grxmlcompile/gr_iface.cpp
+++ b/tools/grxmlcompile/gr_iface.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <string>
 #include <assert.h>
+#include <cstdio>
 
 #include "grph.h"
 
diff --git a/tools/grxmlcompile/sub_base.cpp b/tools/grxmlcompile/sub_base.cpp
index 95368b5..4624b42 100644
--- a/tools/grxmlcompile/sub_base.cpp
+++ b/tools/grxmlcompile/sub_base.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <string>
 #include <assert.h>
+#include <cstdio>
 
 #include "sub_grph.h"
 
diff --git a/tools/grxmlcompile/sub_grph.cpp b/tools/grxmlcompile/sub_grph.cpp
index 4b30556..64b0ce1 100644
--- a/tools/grxmlcompile/sub_grph.cpp
+++ b/tools/grxmlcompile/sub_grph.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <string>
 #include <assert.h>
+#include <cstdio>
 
 #include "sub_grph.h"
 
diff --git a/tools/grxmlcompile/sub_min.cpp b/tools/grxmlcompile/sub_min.cpp
index 9692ec0..4dd9c13 100644
--- a/tools/grxmlcompile/sub_min.cpp
+++ b/tools/grxmlcompile/sub_min.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <string>
 #include <assert.h>
+#include <cstdio>
 
 #include "sub_grph.h"
 
diff --git a/tools/grxmlcompile/sub_supp.cpp b/tools/grxmlcompile/sub_supp.cpp
index 325cd61..4acd394 100644
--- a/tools/grxmlcompile/sub_supp.cpp
+++ b/tools/grxmlcompile/sub_supp.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <string>
 #include <assert.h>
+#include <cstdio>
 
 #include "sub_grph.h"