sysutils/containerd: Add patch from upstream to support Linux containers on FreeBSD

Obtained from:	https://github.com/containerd/containerd/pull/7000
CI:		yes
Saturday, 11-Jun-22 12:10:12 UTC
12.3/amd64
git clone https://github.com/decke/ports.git repo.git
*** Error code 128

Stop.
make: stopped in /root
fatal: destination path 'repo.git' already exists and is not an empty directory.
*** Error code 1

Stop.
make: stopped in /usr/local/caronade/work/123amd64
12.3/i386
git clone https://github.com/decke/ports.git repo.git
*** Error code 128

Stop.
make: stopped in /root
fatal: destination path 'repo.git' already exists and is not an empty directory.
*** Error code 1

Stop.
make: stopped in /usr/local/caronade/work/123i386
13.0/amd64
git clone https://github.com/decke/ports.git repo.git
*** Error code 128

Stop.
make: stopped in /root
fatal: destination path 'repo.git' already exists and is not an empty directory.
*** Error code 1

Stop.
make: stopped in /usr/local/caronade/work/130amd64
13.0/i386
git clone https://github.com/decke/ports.git repo.git
*** Error code 128

Stop.
make: stopped in /root
fatal: destination path 'repo.git' already exists and is not an empty directory.
*** Error code 1

Stop.
make: stopped in /usr/local/caronade/work/130i386
portlint
git clone https://github.com/decke/ports.git repo.git
Cloning into 'repo.git'...
git -C "repo.git" -c advice.detachedHead=false checkout 6517366930a65b9d570a72139aa9c0262006ba1c
HEAD is now at 6517366 sysutils/containerd: Add patch from upstream to support Linux containers on FreeBSD

portlint -A repo.git/sysutils/containerd
looks fine.