third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/javanano/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.nano</groupId>
   <artifactId>protobuf-javanano</artifactId>
-  <version>3.0.0-alpha-6</version>
+  <version>3.1.0</version>
   <packaging>bundle</packaging>
   <name>Protocol Buffer JavaNano API</name>
   <description>
     Protocol Buffers are a way of encoding structured data in an efficient yet
     extensible format.
   </description>
   <inceptionYear>2008</inceptionYear>
   <url>https://developers.google.com/protocol-buffers/</url>
   <licenses>
     <license>
@@ skipping 133 matching lines @@
           </execution>
         </executions>
       </plugin>
       <plugin>
         <groupId>org.apache.felix</groupId>
         <artifactId>maven-bundle-plugin</artifactId>
         <extensions>true</extensions>
         <configuration>
           <instructions>
             <Bundle-DocURL>https://developers.google.com/protocol-buffers/</Bundle-DocURL>
-            <Bundle-SymbolicName>com.google.protobuf</Bundle-SymbolicName>
-            <Export-Package>com.google.protobuf;version=3.0.0-alpha-5</Export-Package>
+            <Bundle-SymbolicName>com.google.protobuf.nano</Bundle-SymbolicName>
+            <Export-Package>com.google.protobuf.nano;version=3.0.0-alpha-7</Export-Package>
           </instructions>
         </configuration>
       </plugin>
     </plugins>
   </build>
   <profiles>
     <profile>
       <id>release</id>
       <distributionManagement>
         <snapshotRepository>
@@ skipping 56 matching lines @@
                <serverId>sonatype-nexus-staging</serverId>
                <nexusUrl>https://oss.sonatype.org/</nexusUrl>
                <autoReleaseAfterClose>false</autoReleaseAfterClose>
             </configuration>
           </plugin>
         </plugins>
       </build>
     </profile>
   </profiles>
 </project>