pgsql: Adjust join_1.out to match Windows behavior for new mergejoin

Log Message:
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Adjust join_1.out to match Windows behavior for new mergejoin regression
test, per Dave Page and buildfarm.  Perhaps we will need a join_2 instead,
but for the moment assume that this test tracks the other diffs.

Tags:
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REL8_1_STABLE

Modified Files:
--------------
    pgsql/src/test/regress/expected:
        join_1.out (r1.6.2.1 -> r1.6.2.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/join_1.out.diff?r1=1.6.2.1&r2=1.6.2.2)