restore FKPortForwardingCommon.h

iOS/FlipperKit/FKPortForwarding/FKPortForwardingCommon.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <Foundation/Foundation.h>
+
+#define FBPFTrace(...) /*NSLog(__VA_ARGS__)*/
+#define FBPFLog(...) NSLog(__VA_ARGS__)
+
+enum {
+  FKPortForwardingFrameTypeOpenPipe = 201,
+  FKPortForwardingFrameTypeWriteToPipe = 202,
+  FKPortForwardingFrameTypeClosePipe = 203,
+};
+
+static dispatch_data_t NSDataToGCDData(NSData* data) {
+  __block NSData* retainedData = data;
+  return dispatch_data_create(data.bytes, data.length, nil, ^{
+    retainedData = nil;
+  });
+}