Convert Subzero's bitcode reader to generate ICE types.

src/IceTypes.cpp

Index: src/IceTypes.cpp
diff --git a/src/IceTypes.cpp b/src/IceTypes.cpp
index 11ac5b780e4fe34121b99858d10d675f90b4126c..afba0b14d1cd92e80a06ee7cc21257dc285e750b 100644
--- a/src/IceTypes.cpp
+++ b/src/IceTypes.cpp
@@ -245,4 +245,18 @@ const char *typeString(Type Ty) {
   return "???";
 }
 
+void FcnSigType::Print(Ostream &Stream) const {
+  Stream << ReturnType << " (";
+  bool IsFirst = true;
+  for (const Type ArgTy : ArgList) {
+    if (IsFirst) {
+      IsFirst = false;
+    } else {
+      Stream << ", ";
+    }
+    Stream << ArgTy;
+  }
+  Stream << ")";
+}
+
 } // end of namespace Ice