[build] revert parrot_old linking regression in windows
[build] revert parrot_old linking regression in windows

Fixes GH #1138

Several non-exported symbols appeared when linking the pure O_FILES in
parrot_old, and not as library.  This exposes typical visibility problems,
which should be fixed later.  For now just revert to the old library linking
and just use O_FILES when needed: i.e. darwin and debugging. See GH #1096

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