third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/php/src/Google/Protobuf/Internal/FieldOptions_CType.php

+<?php
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/descriptor.proto
+
+/**
+ * Protobuf enum <code>google.protobuf.FieldOptions.CType</code>
+ */
+namespace Google\Protobuf\Internal;
+
+class FieldOptions_CType
+{
+    /**
+     * <pre>
+     * Default mode.
+     * </pre>
+     *
+     * <code>STRING = 0;</code>
+     */
+    const STRING = 0;
+    /**
+     * <code>CORD = 1;</code>
+     */
+    const CORD = 1;
+    /**
+     * <code>STRING_PIECE = 2;</code>
+     */
+    const STRING_PIECE = 2;
+}
+