Add Ecore metadata for Sirius's model creation wizard

Change-Id: Ibadcf9388b8f05f6546e16888e38284110a24c07
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>

org.eclipse.emf.ecoretools.design/plugin.xml

diff --git a/org.eclipse.emf.ecoretools.design/plugin.xml b/org.eclipse.emf.ecoretools.design/plugin.xml
index a2cc470..99cf9ac 100644
--- a/org.eclipse.emf.ecoretools.design/plugin.xml
+++ b/org.eclipse.emf.ecoretools.design/plugin.xml
@@ -31,5 +31,10 @@
               type="ecorebin">
         </parser>
      </extension>
-    
+
+  <extension point="org.eclipse.sirius.common.package_meta_data">
+     <ePackageMetaData nsURI="http://www.eclipse.org/emf/2002/Ecore" displayName="Ecore" documentation="The EMF meta-meta-model.">
+        <suggestedRoot className="EPackage" />
+     </ePackageMetaData>    
+   </extension>
 </plugin>