check-stagedir.sh improvement

[antoine]

Summary

• emit only empty directories in prefix and directories outside prefix during make-plist
• whitelisting directories not starting with / is no longer needed during check-orphans after this (it was bogus anyway as %%DIRECTORYINROOT%% was not starting with /)
• adjust missing dirs check to use a list of all directories instead of the dirs from make-plist

[marino]

Thanks for putting this together antoine!

[antoine]

there is an orphan false positive for meta-ports, need to fix

> Checking for items in STAGEDIR missing from pkg-plist

Error: Orphaned: @dir /usr/local

[antoine]

Fix false positive orphans for meta ports

[bapt]

LGTM

[antoine]

Closed by commit rP372177 (authored by @antoine).