pgsql: Schema-qualify references in test_ddl_deparse test script.

Schema-qualify references in test_ddl_deparse test script.

This omission seems to be what is causing buildfarm failures on crake.

Security: CVE-2018-1058

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/fb533e45f91796875939a63e7554efff0da3c8e5

Modified Files
--------------
src/test/modules/test_ddl_deparse/expected/test_ddl_deparse.out | 6 +++---
src/test/modules/test_ddl_deparse/sql/test_ddl_deparse.sql      | 6 +++---
2 files changed, 6 insertions(+), 6 deletions(-)