package/haproxy: bump version to 2.6.22
Changelog: http://www.haproxy.org/download/2.6/src/CHANGELOG
Signed-off-by: Fred Lefranc <fred.lefranc+evs@gmail.com>
[thomas: fixed the '.hash' file from patch to apply]
Signed-off-by: Thomas Perale <thomas.perale@mind.be>