[571025] Adds missing source in build.properties

xtend-gen was missing, so the new command was not built in the Maven build

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=571025

Change-Id: I1d667591e12b8cba6e231f614f0d28f3111e4766
Signed-off-by: Martin Melik Merkumians <melik-merkumians@acin.tuwien.ac.at>
1 file changed