Make package scriptlets more universal

Author: iavael

resources/install-scripts/post-install.in

@@ -6,6 +6,6 @@ echo "Installing AppImageLauncher as interpreter for AppImages"
 
 # as there's no _real_ package that we could use as a dependency to take care of the kernel module,
 # we need to make sure that the kernel module is loaded manually
-modprobe -v binfmt_misc
+modprobe -v binfmt_misc || :
 
-(set -x; systemctl restart systemd-binfmt)
+systemctl try-restart systemd-binfmt.service || echo "ERROR: failed to execute 'systemctl try-restart systemd-binfmt.service', apply binfmt integration manually" >&2

resources/install-scripts/post-uninstall.in

@@ -3,7 +3,7 @@
 set -eo pipefail
 
 echo "Removing AppImageLauncher as interpreter for AppImages"
-(set -x; systemctl restart systemd-binfmt)
+systemctl try-restart systemd-binfmt.service || echo "ERROR: failed to execute 'systemctl try-restart systemd-binfmt.service', apply/remove binfmt integration manually" >&2
 
 update_notifier="/usr/share/update-notifier/notify-reboot-required"
 if [ -x "$update_notifier" ]; then