third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/csharp/src/AddressBook/project.json

Index: third_party/protobuf/csharp/src/AddressBook/project.json
diff --git a/third_party/protobuf/csharp/src/AddressBook/project.json b/third_party/protobuf/csharp/src/AddressBook/project.json
new file mode 100644
index 0000000000000000000000000000000000000000..c500bdc29654ede70525de2803027a0eed429ad2
--- /dev/null
+++ b/third_party/protobuf/csharp/src/AddressBook/project.json
@@ -0,0 +1,20 @@
+{
+  "buildOptions": {
+    "debugType": "portable",
+    "emitEntryPoint": true,
+    "additionalArguments": [ "/main:Google.Protobuf.Examples.AddressBook.Program" ]
+  },
+  "dependencies": {
+    "Google.Protobuf": { "target": "project" }
+  },
+  "frameworks": {
+    "netcoreapp1.0": {
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
+      }
+    }
+  }
+}