Update fusefs-lkl to the latest commit which corresponds to Linux 4.16.0. The last tag is a bit old so i used the commit id, the build fails when applying patch-lib_Build so i removed it.
Done some tests on XFS v4 and XFS v5 without issues.
Reorder variables, fs2tar and cptofs commands are built by default but they aren't included in the port so add a patch to disable LKL_HOST_CONFIG_ARCHIVE and avoid building them (at least for now). This allow to remove devel/argp-standalone which is not needed anymore.