v.decimate: enable in the parent Makefile

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@66919 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/Makefile

@@ -15,6 +15,7 @@ SUBDIRS = \
 	v.colors.out \
 	v.db.connect \
 	v.db.select \
+	v.decimate \
 	v.delaunay \
 	v.distance \
 	v.drape \