setlocalversion: fix version for untaged nontip mercurial revs

The manpage for cut says it will return all lines without the delimiter
unless -s is specified.

When I backed up my mecurial tree to generate modules, I found that the
scm part of localversion was turning up blank.
Signed-off-by: Milton Miller <miltonm@bga.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: "Michał Górny" <gentoo@mgorny.alt.pl>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/setlocalversion

@@ -86,7 +86,7 @@ scm_version()
 
 	# Check for mercurial and a mercurial repo.
 	if hgid=`hg id 2>/dev/null`; then
-		tag=`printf '%s' "$hgid" | cut -d' ' -f2`
+		tag=`printf '%s' "$hgid" | cut -s -d' ' -f2`
 
 		# Do we have an untagged version?
 		if [ -z "$tag" -o "$tag" = tip ]; then