Synthesize methods with va-arg list correctly.

llvm-svn: 46212
diff --git a/clang/Driver/RewriteTest.cpp b/clang/Driver/RewriteTest.cpp
index b111e09..c1243b9 100644
--- a/clang/Driver/RewriteTest.cpp
+++ b/clang/Driver/RewriteTest.cpp
@@ -606,6 +606,8 @@
     ResultStr += " ";
     ResultStr += PDecl->getName();
   }
+  if (OMD->isVariadic())
+    ResultStr += ", ...";
   ResultStr += ") ";
   
 }