releng: Bump build-helper-maven-plugin to v3.4.0

Bump the build-helper-maven-plugin version from 3.0.0 to 3.4.0.

Change-Id: Ic2b47d2d080c99a05880911c63d80e067b899dd8
Signed-off-by: Marco Miller <marco.miller@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/203615
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>

releng/org.eclipse.tracecompass.target/pom.xml

@@ -32,7 +32,7 @@
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>build-helper-maven-plugin</artifactId>
-          <version>3.0.0</version>
+          <version>3.4.0</version>
           <executions>
             <execution>
               <id>attach-artifacts</id>