logrotate: Update to 3.5.1

logrotate: Update to 3.5.1

For details see:
https://github.com/logrotate/logrotate/releases

"use correct create mode in examples/btmp (#257)"
=> https://github.com/logrotate/logrotate/pull/257

"fix several bugs found by fuzzing (#254)"
=> https://github.com/logrotate/logrotate/issues/254

"do not abort globbing on a broken symlink (#251)"
=> https://github.com/logrotate/logrotate/issues/251

"rearrange logrotate.8 man page to improve readability (#248)"
=> https://github.com/logrotate/logrotate/pull/248

"encourage admins to use the su directive in logrotate.8 man page (#236)"
=> https://github.com/logrotate/logrotate/pull/236

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>