[SMX4-1883] Add sources for spring bundles

git-svn-id: https://svn.apache.org/repos/asf/servicemix/smx4/bundles/trunk/spring-instrument-3.2.7.RELEASE@1637406 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 539c42b..b386577 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,6 +52,14 @@
             <artifactId>${pkgArtifactId}</artifactId>
             <version>${pkgVersion}</version>
         </dependency>
+
+        <!-- sources -->
+        <dependency>
+            <groupId>${pkgGroupId}</groupId>
+            <artifactId>${pkgArtifactId}</artifactId>
+            <version>${pkgVersion}</version>
+            <classifier>sources</classifier>
+        </dependency>
     </dependencies>
 
     <build>