Fix another const bug in function.  Thanks to Daniel Krugler for finding this and the previous bug.

llvm-svn: 113686
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 37030a77a08fc1194b9fc77c7dc2eea6d52e3150
diff --git a/include/functional b/include/functional
index b9378aa..3cc21d4 100644
--- a/include/functional
+++ b/include/functional
@@ -1141,9 +1141,9 @@
 
     // deleted overloads close possible hole in the type system
     template<class _R2, class... _ArgTypes2>
-      bool operator==(const function<_R2(_ArgTypes2...)>&) = delete;
+      bool operator==(const function<_R2(_ArgTypes2...)>&) const = delete;
     template<class _R2, class... _ArgTypes2>
-      bool operator!=(const function<_R2(_ArgTypes2...)>&) = delete;
+      bool operator!=(const function<_R2(_ArgTypes2...)>&) const = delete;
 public:
     // function invocation:
     _R operator()(_ArgTypes...) const;