Mars Compatibility Fragment should be built against an Eclipse Mars target.

Change-Id: I4b008269088831f754b7504d342587a7b3fc8608
Reviewed-on: https://git.eclipse.org/r/34542
Tested-by: Hudson CI
Reviewed-by: Matthias Villiger <mvi@bsiag.com>
diff --git a/org.eclipse.scout.sdk.compatibility.v45.fragment/pom.xml b/org.eclipse.scout.sdk.compatibility.v45.fragment/pom.xml
index 4741355..5e20ffd 100644
--- a/org.eclipse.scout.sdk.compatibility.v45.fragment/pom.xml
+++ b/org.eclipse.scout.sdk.compatibility.v45.fragment/pom.xml
@@ -25,6 +25,6 @@
   <packaging>eclipse-plugin</packaging>
 
   <properties>
-    <target-platform>eclipse-luna</target-platform>
+    <target-platform>eclipse-mars</target-platform>
   </properties>
 </project>