third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/protoc-artifacts/pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>com.google</groupId>
     <artifactId>google</artifactId>
     <version>1</version>
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protoc</artifactId>
-  <version>3.0.0-beta-2</version>
+  <version>3.1.0</version>
   <packaging>pom</packaging>
   <name>Protobuf Compiler</name>
   <description>
     Protobuf Compiler (protoc) is a compiler for .proto files. It generates
     language-specific code for Protobuf messages and RPC interfaces.
   </description>
   <inceptionYear>2008</inceptionYear>
   <url>https://developers.google.com/protocol-buffers/</url>
   <licenses>
     <license>
@@ skipping 28 matching lines @@
               <goal>exec</goal>
             </goals>
           </execution>
         </executions>
         <configuration>
           <executable>bash</executable>
           <arguments>
             <argument>build-protoc.sh</argument>
             <argument>${os.detected.name}</argument>
             <argument>${os.detected.arch}</argument>
+            <argument>protoc</argument>
           </arguments>
         </configuration>
       </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
         <version>1.8</version>
         <executions>
           <execution>
             <id>attach-artifacts</id>
@@ skipping 53 matching lines @@
                <skipStagingRepositoryClose>true</skipStagingRepositoryClose>
                <autoReleaseAfterClose>false</autoReleaseAfterClose>
                <stagingRepositoryId>${staging.repository}</stagingRepositoryId>
             </configuration>
           </plugin>
         </plugins>
       </build>
     </profile>
   </profiles>
 </project>