scripts: Replace tabs in locking.sh

Replace two stray tabs with spaces to make the file whitespace
consistent.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Wei Liu <wl@xen.org>

tools/hotplug/Linux/locking.sh

@@ -58,8 +58,8 @@ claim_lock()
             print "y\n" if $fd_inum eq $file_inum;
                              ' "$_lockfile" )
         if [ x$rightfile = xy ]; then break; fi
-	# Some versions of bash appear to be buggy if the same
-	# $_lockfile is opened repeatedly. Close the current fd here.
+        # Some versions of bash appear to be buggy if the same
+        # $_lockfile is opened repeatedly. Close the current fd here.
         eval "exec $_lockfd<&-"
     done
 }