Added gpg signing to verify phase

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/hc-stylecheck/trunk@1492204 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index c1d5d96..37ed75a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,6 +56,16 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>
+            <version>1.4</version>
+            <executions>
+              <execution>
+                <id>sign-artifacts</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+              </execution>
+            </executions>
           </plugin>
         </plugins>
       </build>