Fix EC build.xml

Required library was not copied to $CLARA_SERVICES/lib.

git-svn-id: https://clas12svn.jlab.org/repos/clas12/EC_reconstruction/trunk@9607 b9d438ff-8729-0410-a4ab-d2f36c9c72ed
Workaround to use standard writer with standalone EC

git-svn-id: https://clas12svn.jlab.org/repos/clas12/EC_reconstruction/trunk@9608 b9d438ff-8729-0410-a4ab-d2f36c9c72ed
Overwrite output file in standalone EC

git-svn-id: https://clas12svn.jlab.org/repos/clas12/EC_reconstruction/trunk@9609 b9d438ff-8729-0410-a4ab-d2f36c9c72ed