forgot to reserve a bit to store the move-only flag

Author: kavon

include/swift/AST/Types.h

@@ -399,9 +399,9 @@ class alignas(1 << TypeAlignInBits) TypeBase
     NumProtocols : 16
   );
 
-  SWIFT_INLINE_BITFIELD_FULL(TypeVariableType, TypeBase, 6+32,
+  SWIFT_INLINE_BITFIELD_FULL(TypeVariableType, TypeBase, 7+32,
     /// Type variable options.
-    Options : 6,
+    Options : 7,
     : NumPadBits,
     /// The unique number assigned to this type variable.
     ID : 32