update on the directory to be copied before doing it, even if it is up
to date.
Anyway: Ported RamFS to Haiku's FS interface. Change set apparently merged
with older changes.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20346 a95241bf-73f2-0310-859d-f6bbb57e9c96