[447593] update "org.eclipse.net4j.util" plugin release

Since
"plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/om/trace/Tracer.java"
content has changed in previous commit, the plugin release service
number must be increased.

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=447593
Change-Id: I044f27ff8bd0d3d9e3920e11e5548f31894e007a
Signed-off-by: Esteban Dugueperoux <esteban.dugueperoux@obeo.fr>