Fixes to systemd service file

I tested and seems that both are in disabled state in actdead target:
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[root@Jolla user]# systemctl-user status tracker-miner-fs
tracker-miner-fs.service - Tracker Miner
   Loaded: loaded (/usr/lib/systemd/user/tracker-miner-fs.service; disabled)
   Active: inactive (dead)

[root@Jolla user]# systemctl-user status tracker-store
tracker-store.service - Tracker Store
   Loaded: loaded (/usr/lib/systemd/user/tracker-store.service; disabled)
   Active: inactive (dead)
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