t/t7300: workaround ancient touch by rearranging arguments

The ancient touch on Solaris 7 thinks that a decimal number supplied as the first argument specifies a date_time to give to the files specified by the remaining arguments. In this case, it fails to parse '1' as a proper date_time and exits with a failure status. Workaround this flaw by rearranging the arguments supplied to touch so that a non-digit appears first and touch will not be confused. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>