added source bundle generation to releng

tools.descartes.pmx.releng/pom.xml

@@ -50,7 +50,19 @@
 				<groupId>org.eclipse.tycho</groupId>
 				<artifactId>tycho-maven-plugin</artifactId>
 			</plugin>
-
+		    <plugin>
+       			<groupId>org.eclipse.tycho</groupId>
+				<artifactId>tycho-source-plugin</artifactId>
+				<version>${tycho-version}</version>
+				<executions>
+					<execution>
+    				<id>plugin-source</id>
+					    <goals>
+							<goal>plugin-source</goal>
+					    </goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.eclipse.tycho</groupId>
 				<artifactId>target-platform-configuration</artifactId>