tags2lists: filter out vim swap files

The (funny but somewhat confusing) problem manifests itself as

  E: Couldn't find package Binary

during a build run in the profile where a tagged packagelist
referenced by a specific target being built is open with vim
(which results in .FILE.sw? temporary file lying aside).

bin/tags2lists

@@ -30,4 +30,4 @@ transformed="$(sed \
 	-e "s, *) *, ) ,g")"
 
 [ "$DEBUG" = 2 ] && echo "`basename $0`: transformed = \"$transformed\"" >&2
-[ -z "$transformed" ] || find $transformed | sed 's,^\./,,'
+[ -z "$transformed" ] || find $transformed | sed 's,^\./,,' | grep -v '\.sw.$'