Pull new version of protobuf sources.

third_party/protobuf/examples/addressbook.proto

Index: third_party/protobuf/examples/addressbook.proto
diff --git a/third_party/protobuf/examples/addressbook.proto b/third_party/protobuf/examples/addressbook.proto
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index 0000000000000000000000000000000000000000..bfdceeafac63382322947e61a86aadf039ef197d
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+// See README.txt for information and build instructions.
+
+syntax = "proto3";
+
+package tutorial;
+
+option java_package = "com.example.tutorial";
+option java_outer_classname = "AddressBookProtos";
+option csharp_namespace = "Google.Protobuf.Examples.AddressBook";
+
+message Person {
+  string name = 1;
+  int32 id = 2;        // Unique ID number for this person.
+  string email = 3;
+
+  enum PhoneType {
+    MOBILE = 0;
+    HOME = 1;
+    WORK = 2;
+  }
+
+  message PhoneNumber {
+    string number = 1;
+    PhoneType type = 2;
+  }
+
+  repeated PhoneNumber phones = 4;
+}
+
+// Our address book file is just one of these.
+message AddressBook {
+  repeated Person people = 1;
+}