more standards-compliance stuff


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25014 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index 5d946c2..3f8547d 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -28,6 +28,7 @@
 #include <algorithm>
 #include <cstdio>
 #include <fstream>
+#include <ios>
 using namespace llvm;
 
 enum ActionType {