fedora: update spec and serial.conf to match /usr/sbin path

misc/serial.conf

@@ -18,4 +18,4 @@ stop on runlevel [016]
 instance $DEV
 respawn
 pre-start exec /sbin/securetty $DEV
-exec /sbin/agetty -l /sbin/qubes-serial-login /dev/$DEV $SPEED vt100-nav
+exec /sbin/agetty -l /usr/sbin/qubes-serial-login /dev/$DEV $SPEED vt100-nav

rpm_spec/core-vm.spec

@@ -291,7 +291,7 @@ rm -f %{name}-%{version}
 %config(noreplace) /etc/yum.repos.d/qubes.repo
 /etc/yum/pluginconf.d/yum-qubes-hooks.conf
 /etc/yum/post-actions/qubes-trigger-sync-appmenus.action
-/sbin/qubes-serial-login
+/usr/sbin/qubes-serial-login
 /usr/bin/qvm-copy-to-vm
 /usr/bin/qvm-open-in-dvm
 /usr/bin/qvm-open-in-vm