Revert r170500. It over-zealously converted *ALL* things named Attributes, which is wrong here.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170721 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index f021c71..fb9c70c 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -1399,7 +1399,7 @@
       OS << ExceptionSpec;
     }
 
-    // FIXME: Attribute
+    // FIXME: Attributes
 
     // Print the trailing return type if it was specified in the source.
     if (Node->hasExplicitResultType())