Implement more of C++0x 'auto'. A variable with an auto type specifier must have an initializer. Also, move some tests around to match the C++0x draft better.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@75322 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index fd368c4..7a9faac 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -1006,7 +1006,7 @@
   case NullPtr:           return "nullptr_t";
   case Overload:          return "<overloaded function type>";
   case Dependent:         return "<dependent type>";
-  case UndeducedAuto:     return "<undeduced auto type>";
+  case UndeducedAuto:     return "auto";
   }
 }