Handle unnamed bitfields when parsing C++ classes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52855 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx-class.cpp b/test/Parser/cxx-class.cpp
index f0b419d..6d030bd 100644
--- a/test/Parser/cxx-class.cpp
+++ b/test/Parser/cxx-class.cpp
@@ -8,6 +8,7 @@
   struct S {};
   enum {};
   int; // expected-error {{error: declaration does not declare anything}}
+  int : 1, : 2;
 
 public:
   void m() {