pgsql: Adjust SP-GiST regression tests to be less locale-sensitive.

Adjust SP-GiST regression tests to be less locale-sensitive.

The original test cases gave varying results depending on whether the
locale sorts digits before or after letters.  Since that's not really
what we wish to test here, adjust the test data to not contain any strings
beginning with digits.  Per report from Pavel Stehule.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/15ba590792045a6bbde538c407a34d83f46b496f

Modified Files
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src/test/regress/expected/create_index.out |   92 ++++++++++++++--------------
src/test/regress/sql/create_index.sql      |   38 ++++++------
2 files changed, 65 insertions(+), 65 deletions(-)