Fix zip test by adding O_BINARY by ifdef

[cielavenir]

@gaborcsardi @jimhester

About how to define O_BINARY, defining it depending on OS is troublesome as there are plenty of ways to check OS.

I now use #ifndef O_BINARY.

Hope it is universal enough for you to like it.

[cielavenir]

sigh GHA CI had internal error (though Windows passed)