package/luasyslog: bump to version 2.2.0 from a fork

package/luasyslog: bump to version 2.2.0 from a fork

This commit switches the luasyslog package to use a fork of the
project that has good Lua 5.3 support.

This fork has a public repository on Github
(https://github.com/ntd/luasyslog/), and is available as a Lua Rock
(https://luarocks.org/modules/ntd/luasyslog), but unfortunately the
rockspec uses a build method that is not supported by the Buildroot
luarocks infrastructure. Therefore, we used the autotools build system
provided by this fork.

Because this fork has good support for Lua 5.3, the "Lua 5.3
compatibility" patch becomes useless and can be dropped.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>