pgsql: Add alternative output for ON CONFLICT toast isolation test.

Add alternative output for ON CONFLICT toast isolation test.

On some buildfarm animals the isolationtest added in 07ef0351 failed, as
the order in which processes are run after unlocking is not
guaranteed. Add an alternative output for that.

Discussion: <7969.1471484738@sss.pgh.pa.us>
Backpatch: 9.6, like the test in the aforementioned commit

Branch
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REL9_6_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/0d5afd3f21e1f3bfb76a50aa613620b9caba4a4e

Modified Files
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src/test/isolation/expected/insert-conflict-toast_1.out | 15 +++++++++++++++
1 file changed, 15 insertions(+)