Mark artificial types as such in the annotated debug output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171826 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index 6ca692e..d288308 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -1095,6 +1095,9 @@
   else if (isProtected())
     OS << " [protected]";
 
+  if (isArtificial())
+    OS << " [artificial]";
+
   if (isForwardDecl())
     OS << " [fwd]";
 }