Moving one misplaced entry in the attribute enum in AttributeList.h into alphabetical order.

llvm-svn: 135153

clang/include/clang/Sema/AttributeList.h

@@ -158,6 +158,7 @@ public:
     AT_always_inline,
     AT_analyzer_noreturn,
     AT_annotate,
+    AT_arc_weakref_unavailable,
     AT_availability,      // Clang-specific
     AT_base_check,
     AT_blocks,
@@ -243,7 +244,6 @@ public:
     AT_weak,
     AT_weak_import,
     AT_weakref,
-    AT_arc_weakref_unavailable,
     IgnoredAttribute,
     UnknownAttribute
   };