Include about.html files in maven build

Change-Id: Ifa96090eb0fc336ee8080385f48212b5158dd9f7
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
diff --git a/org.eclipse.jgit.pgm/pom.xml b/org.eclipse.jgit.pgm/pom.xml
index bcbe74c..f494039 100644
--- a/org.eclipse.jgit.pgm/pom.xml
+++ b/org.eclipse.jgit.pgm/pom.xml
@@ -109,6 +109,7 @@
         <directory>.</directory>
         <includes>
           <include>META-INF/services/org.eclipse.jgit.pgm.TextBuiltin</include>
+          <include>about.html</include>
         </includes>
       </resource>
       <resource>