Convert 'struct' to 'class' in various places to adhere to the coding standards

and work better with VC++.  Patch contributed by Morten Ofstad!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17281 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Use.h

@@ -35,7 +35,7 @@ class Use {
   Value *Val;
   User *U;
   Use *Prev, *Next;
-  friend class ilist_traits<Use>;
+  friend struct ilist_traits<Use>;
 public:
   inline Use(Value *v, User *user);
   inline Use(const Use &u);