v.outlier: add 6.4 compatibility (backport https://trac.osgeo.org/grass/changeset/66238)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@66239 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/renamed_options

@@ -619,6 +619,7 @@ v.out.vtk|scale:zscale
 # v.outlier
 v.outlier|soe:ew_step
 v.outlier|son:ns_step
+v.outlier|lambda_i:lambda
 v.outlier|thres_o:threshold
 # v.qcount
 v.qcount|n:nquadrats