Add the private keyword to the polygen grammar.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76135 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/llvm.grm b/utils/llvm.grm
index 1426e3b..e70533a 100644
--- a/utils/llvm.grm
+++ b/utils/llvm.grm
@@ -89,6 +89,7 @@
  | appending
  | dllexport
  | common
+ | private
  ;
 
 GVExternalLinkage