openssh: add ed25519 host key location to read-only sshd config

It's simply been missing.

(From OE-Core rev: ebd1ea45e67211bd2ab0ec7affab409908126ef3)

Signed-off-by: André Draszik <git@andred.net>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/openssh/openssh_7.2p2.bb

@@ -115,6 +115,7 @@ do_install_append () {
 	echo "HostKey /var/run/ssh/ssh_host_rsa_key" >> ${D}${sysconfdir}/ssh/sshd_config_readonly
 	echo "HostKey /var/run/ssh/ssh_host_dsa_key" >> ${D}${sysconfdir}/ssh/sshd_config_readonly
 	echo "HostKey /var/run/ssh/ssh_host_ecdsa_key" >> ${D}${sysconfdir}/ssh/sshd_config_readonly
+	echo "HostKey /var/run/ssh/ssh_host_ed25519_key" >> ${D}${sysconfdir}/ssh/sshd_config_readonly
 
 	install -d ${D}${systemd_unitdir}/system
 	install -c -m 0644 ${WORKDIR}/sshd.socket ${D}${systemd_unitdir}/system