third_party/protobuf: Update to HEAD (5f65ee6ac7)

third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs

Index: third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs b/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
index 8a6fefa74e88ab99e2876e7265dcaa682c15e65c..e3914dd3749598becd41ffc95f144c2294dd7750 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
+++ b/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
@@ -47,7 +47,11 @@ namespace Google.Protobuf.Compatibility
         /// </summary>
         internal static MethodInfo GetGetMethod(this PropertyInfo target)
         {
+#if DOTNET35
+            var method = target.GetGetMethod();
+#else
             var method = target.GetMethod;
+#endif
             return method != null && method.IsPublic ? method : null;
         }
 
@@ -57,7 +61,11 @@ namespace Google.Protobuf.Compatibility
         /// </summary>
         internal static MethodInfo GetSetMethod(this PropertyInfo target)
         {
+#if DOTNET35
+            var method = target.GetSetMethod();
+#else
             var method = target.SetMethod;
+#endif
             return method != null && method.IsPublic ? method : null;
         }
     }