Add a AttributeSetImpl::dump function.

This is for the benefit of those of us with inferior debuggers which
do not permit member function calls on value types.

llvm-svn: 187685
diff --git a/llvm/lib/IR/AttributeImpl.h b/llvm/lib/IR/AttributeImpl.h
index 7bf9e8a..9da3f96 100644
--- a/llvm/lib/IR/AttributeImpl.h
+++ b/llvm/lib/IR/AttributeImpl.h
@@ -258,6 +258,8 @@
 
   // FIXME: This atrocity is temporary.
   uint64_t Raw(unsigned Index) const;
+
+  void dump() const;
 };
 
 } // end llvm namespace