Thread: pgsql: Fix recently-added array_agg tests to ensure they produce stable

Log Message:
-----------
Fix recently-added array_agg tests to ensure they produce stable results
regardless of plan changes.  Per intermittent buildfarm failures on
"pigeon" and others.

Modified Files:
--------------
    pgsql/src/test/regress/sql:
        arrays.sql (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/arrays.sql?r1=1.34&r2=1.35)
    pgsql/src/test/regress/expected:
        arrays.out (r1.45 -> r1.46)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/arrays.out?r1=1.45&r2=1.46)