pgsql: Add missing newlines at the end of two SQL files

Add missing newlines at the end of two SQL files

arrays.sql was already missing it before 49d6c7d8daba, and I have just
noticed it thanks to this commit. The second one in test_slru has been
introduced by 768a9fd5535f.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/027124a872d7b5dfddc69590af42f626b1727dba

Modified Files
--------------
src/test/modules/test_slru/test_slru--1.0.sql | 2 +-
src/test/regress/sql/arrays.sql | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)