pgsql: meson: Implement getopt logic from autoconf

meson: Implement getopt logic from autoconf

Not replacing getopt/getopt_long definitely causes issues on mingw. It's not
as clear whether the solaris & openbsd aspect is still needed, but if not, we
should remove it from both autoconf and meson.

Discussion: /messages/by-id/20220928022724.erzuk5v4ai4b53do@awork3.anarazel.de

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/a1b3bca1c8e32c31ba1a8d1125b2eb97f750a7f0

Modified Files
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meson.build | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)