beesd: add missing RuntimeDirectory

Since we started locking down the beesd service, we no longer have
privileges to do some things.  Have systemd do it for us instead.

Fixes: #195
Signed-off-by: Zygo Blaxell <bees@furryterror.org>

scripts/beesd@.service.in

@@ -17,6 +17,7 @@ KillSignal=SIGTERM
 MemoryAccounting=true
 Nice=19
 Restart=on-abnormal
+RuntimeDirectory=bees
 StartupCPUWeight=25
 StartupIOWeight=25