pgsql: fix most regression tests for new cube code.

Log Message:
-----------
fix most regression tests for new cube code.

Modified Files:
--------------
    pgsql/contrib/cube/expected:
        cube.out (r1.17 -> r1.18)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/expected/cube.out.diff?r1=1.17&r2=1.18)
        cube_1.out (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/expected/cube_1.out.diff?r1=1.3&r2=1.4)
    pgsql/contrib/cube/sql:
        cube.sql (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/sql/cube.sql.diff?r1=1.9&r2=1.10)
    pgsql/contrib/earthdistance/expected:
        earthdistance.out (r1.9 -> r1.10)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/earthdistance/expected/earthdistance.out.diff?r1=1.9&r2=1.10)
    pgsql/contrib/earthdistance/sql:
        earthdistance.sql (r1.7 -> r1.8)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/earthdistance/sql/earthdistance.sql.diff?r1=1.7&r2=1.8)