buildroot

logrotate: bump to version 3.11.0

Also removed both patches as they have been added to this release.
Aslo removed reference to github patch in makefile as it has been
added to this release as well.

Signed-off-by: Adam Duskett <Adamduskett@outlook.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>