[NFC] Make Module::getIFuncList() private

[vporpo]

Summary

This is a followup to d180443570d7895193d2ab6f1e1486d669dc9723
which did not actually remove the public keyword.

llvm/include/llvm/IR/Module.h

private: // Please use functions like insertAlias(), removeAlias() etc.
   /// Get the Module's list of aliases.
   AliasListType          &getAliasList()              { return AliasList; }
 
   static AliasListType Module::*getSublistAccess(GlobalAlias*) {
     return &Module::AliasList;
   }
   friend class llvm::SymbolTableListTraits<llvm::GlobalAlias>;
 
-public:
   /// Get the Module's list of ifuncs (constant).
   const IFuncListType    &getIFuncList() const        { return IFuncList; }
   /// Get the Module's list of ifuncs.
   IFuncListType          &getIFuncList()              { return IFuncList; }
 
   static IFuncListType Module::*getSublistAccess(GlobalIFunc*) {
     return &Module::IFuncList;
   }