pgsql: Add -w back to the flags for pg_ctl (re)start in PostgresNode

Add -w back to the flags for pg_ctl (re)start in PostgresNode

This is now the default for pg_ctl, but having the flag here explicitly
does no harm and helps with backwards compatibility of the PostgresNode
module.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/b33259e261ae99dc7c503a6a7615bd492047588b

Modified Files
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src/test/perl/PostgresNode.pm | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)