upgrade gpg plugin

git-svn-id: https://svn.apache.org/repos/asf/geronimo/xbean/trunk@1842678 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index ec9ce92..7bfe662 100644
--- a/pom.xml
+++ b/pom.xml
@@ -321,6 +321,35 @@
 
     </dependencies>
 
+    <profiles>
+        <profile>
+            <id>apache-release</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>1.6</version>
+                        <configuration>
+                            <passphrase>${gpg.passphrase}</passphrase>
+                            <useAgent>${gpg.useagent}</useAgent>
+                            <gpgArguments>
+                                <arg>--digest-algo=SHA512</arg>
+                            </gpgArguments>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
     <build>
         <defaultGoal>install</defaultGoal>
 
@@ -351,7 +380,6 @@
                         </instructions>
                     </configuration>
                 </plugin>
-
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>