Fixed typedef inside extern "C".

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109865 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index 7ed07a2..bd8c245 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -196,6 +196,7 @@
   }
 
   if (Tok.isNot(tok::l_brace)) {
+    DS.setExternInLinkageSpec(true);
     ParseDeclarationOrFunctionDefinition(DS, Attr.AttrList);
     return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec,
                                                    SourceLocation());