package/logrotate: bump to 3.18.0 version
Main reason is to fix the issue when secure_getenv() is missing
in older toolchain, but it was fixed in this version by using
getenv() as alternative.
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>