Add FB build for ReactReconcilerConstants (#29003)

In order to integrate the `react-reconciler` build created in #28880
with third party libraries, we need to have matching
`react-reconciler/constants` to go with it.

DiffTrain build for [5d29478](5d29478)

Author: jackpope

compiled/facebook-www/REVISION

@@ -1 +1 @@
-0a0a3af75a740d0920ebf7f4affaf8d1ce8c107f
+5d29478716cefbf8290dfdd19129156c2ac75973

compiled/facebook-www/ReactReconcilerConstants-dev.classic.js

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ * @nolint
+ * @preventMunge
+ * @preserve-invariant-messages
+ */
+
+'use strict';
+
+if (__DEV__) {
+  (function() {
+'use strict';
+
+// This refers to a WWW module.
+require('warning');
+
+// Re-export dynamic flags from the www version.
+require('ReactFeatureFlags');
+
+var NoLane =
+/*                          */
+0;
+var SyncLane =
+/*                        */
+2;
+var InputContinuousLane =
+/*             */
+8;
+var DefaultLane =
+/*                     */
+32;
+var IdleLane =
+/*                        */
+268435456;
+
+var NoEventPriority = NoLane;
+var DiscreteEventPriority = SyncLane;
+var ContinuousEventPriority = InputContinuousLane;
+var DefaultEventPriority = DefaultLane;
+var IdleEventPriority = IdleLane;
+
+var LegacyRoot = 0;
+var ConcurrentRoot = 1;
+
+exports.ConcurrentRoot = ConcurrentRoot;
+exports.ContinuousEventPriority = ContinuousEventPriority;
+exports.DefaultEventPriority = DefaultEventPriority;
+exports.DiscreteEventPriority = DiscreteEventPriority;
+exports.IdleEventPriority = IdleEventPriority;
+exports.LegacyRoot = LegacyRoot;
+exports.NoEventPriority = NoEventPriority;
+  })();
+}

compiled/facebook-www/ReactReconcilerConstants-dev.modern.js

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ * @nolint
+ * @preventMunge
+ * @preserve-invariant-messages
+ */
+
+'use strict';
+
+if (__DEV__) {
+  (function() {
+'use strict';
+
+// This refers to a WWW module.
+require('warning');
+
+// Re-export dynamic flags from the www version.
+require('ReactFeatureFlags');
+
+var NoLane =
+/*                          */
+0;
+var SyncLane =
+/*                        */
+2;
+var InputContinuousLane =
+/*             */
+8;
+var DefaultLane =
+/*                     */
+32;
+var IdleLane =
+/*                        */
+268435456;
+
+var NoEventPriority = NoLane;
+var DiscreteEventPriority = SyncLane;
+var ContinuousEventPriority = InputContinuousLane;
+var DefaultEventPriority = DefaultLane;
+var IdleEventPriority = IdleLane;
+
+var LegacyRoot = 0;
+var ConcurrentRoot = 1;
+
+exports.ConcurrentRoot = ConcurrentRoot;
+exports.ContinuousEventPriority = ContinuousEventPriority;
+exports.DefaultEventPriority = DefaultEventPriority;
+exports.DiscreteEventPriority = DiscreteEventPriority;
+exports.IdleEventPriority = IdleEventPriority;
+exports.LegacyRoot = LegacyRoot;
+exports.NoEventPriority = NoEventPriority;
+  })();
+}

compiled/facebook-www/ReactReconcilerConstants-prod.classic.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ * @nolint
+ * @preventMunge
+ * @preserve-invariant-messages
+ */
+
+"use strict";
+require("ReactFeatureFlags");
+exports.ConcurrentRoot = 1;
+exports.ContinuousEventPriority = 8;
+exports.DefaultEventPriority = 32;
+exports.DiscreteEventPriority = 2;
+exports.IdleEventPriority = 268435456;
+exports.LegacyRoot = 0;
+exports.NoEventPriority = 0;

compiled/facebook-www/ReactReconcilerConstants-prod.modern.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ * @nolint
+ * @preventMunge
+ * @preserve-invariant-messages
+ */
+
+"use strict";
+require("ReactFeatureFlags");
+exports.ConcurrentRoot = 1;
+exports.ContinuousEventPriority = 8;
+exports.DefaultEventPriority = 32;
+exports.DiscreteEventPriority = 2;
+exports.IdleEventPriority = 268435456;
+exports.LegacyRoot = 0;
+exports.NoEventPriority = 0;