Add log rotate support for dumper files

[zuckschwerdt]

Adds basic log rotate support, i.e. reopening renamed files for dumpers.

This should now work:

rtl_433 -w OOK:my.ook &
sleep 10
ls -al my*ook
mv my.ook my-old.ook
sleep 10
ls -al my*ook
fg

S.a. discussion #2874

Adding this for file outputs (e.g. json) would be more involved but should later also be implemented.