autoupdater: stop non-essential services before downloading the image

...n-alfred/files/usr/lib/autoupdater/abort.d/60gluon-alfred

...lfred/files/usr/lib/autoupdater/download.d/40gluon-alfred

package/gluon-autoupdater/files/lib/gluon/autoupdater/lib.sh

...ter/files/usr/lib/autoupdater/abort.d/90gluon-autoupdater

.../files/usr/lib/autoupdater/download.d/10gluon-autoupdater

...uon-radvd/files/usr/lib/autoupdater/abort.d/80gluon-radvd

...-radvd/files/usr/lib/autoupdater/download.d/20gluon-radvd

...spondd/files/usr/lib/autoupdater/abort.d/50gluon-respondd

...ndd/files/usr/lib/autoupdater/download.d/50gluon-respondd

...files/usr/lib/autoupdater/abort.d/70gluon-status-page-api

...es/usr/lib/autoupdater/download.d/30gluon-status-page-api