busybox/testsuite/tail/tail-n-works

$ECHO -ne "abc\ndef\n123\n" >input
$ECHO -ne "def\n123\n" >logfile.ok
busybox tail -n 2 input > logfile.bb
cmp logfile.ok logfile.bb
testsuite: uniformly use $ECHO with -n -e 2008-07-12 03:11:14 +05:30			`$ECHO -ne "abc\ndef\n123\n" >input`
			`$ECHO -ne "def\n123\n" >logfile.ok`
tail: fix fallout from tail -c optimization 2008-03-23 08:58:40 +05:30			`busybox tail -n 2 input > logfile.bb`
			`cmp logfile.ok logfile.bb`