pgsql: pageinspect: Make btree test more portable

pageinspect: Make btree test more portable

Choose test data that makes the output independent of endianness and
alignment.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/f7c9a6e083da3f64e7440a31960b837353514262

Modified Files
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contrib/pageinspect/expected/btree.out | 6 +++---
contrib/pageinspect/sql/btree.sql      | 4 ++--
2 files changed, 5 insertions(+), 5 deletions(-)