pgsql: Add check for large files in meson.build

Add check for large files in meson.build

A similar check existed in the MSVC scripts that have been removed in
v17 by 1301c80b2167, but nothing of the kind was checked in meson when
building with a 4-byte off_t.

This commit adds a check to fail the builds when trying to use a
relation file size higher than 1GB when off_t is 4 bytes, like
./configure, rather than detecting these failures at runtime because the
code is not able to handle large files in this case.

Backpatch down to v16, where meson has been introduced.

Discussion: https://postgr.es/m/aQ0hG36IrkaSGfN8@paquier.xyz
Backpatch-through: 16

Branch
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REL_18_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/434b605745a1a0337c009a79cd7c6c15867fa6c5

Modified Files
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meson.build | 8 ++++++++
1 file changed, 8 insertions(+)