surround _createOffsetBasedKeyPath in SWIFT_ENABLE_REFLECTION

Author: Azoy

stdlib/public/core/KeyPath.swift

@@ -3893,6 +3893,8 @@ internal func _instantiateKeyPathBuffer(
   return offset
 }
 
+#if SWIFT_ENABLE_REFLECTION
+
 @available(SwiftStdlib 5.9, *)
 public func _createOffsetBasedKeyPath(
   root: Any.Type,
@@ -3943,8 +3945,6 @@ public func _createOffsetBasedKeyPath(
   return kp
 }
 
-#if SWIFT_ENABLE_REFLECTION
-
 @_silgen_name("swift_keyPath_copySymbolName")
 fileprivate func keyPath_copySymbolName(
   _: UnsafeRawPointer