Fix Envoy Service yaml for build script (magma#4920)

Signed-off-by: Nick Yurchenko <[email protected]>

lte/gateway/release/build-magma.sh

@@ -359,6 +359,7 @@ $(glob_files "${MAGMA_ROOT}/orc8r/gateway/configs/templates/*" /etc/magma/templa
 ${CONTROL_PROXY_FILE}=/etc/magma/ \
 $(glob_files "${ANSIBLE_FILES}/magma_modules_load" /etc/modules-load.d/magma.conf) \
 $(glob_files "${ANSIBLE_FILES}/configure_envoy_namespace.sh" /usr/local/bin/ ) \
+$(glob_files "${ANSIBLE_FILES}/envoy.yaml" /var/opt/magma/ ) \
 $(glob_files "${ANSIBLE_FILES}/logrotate_oai.conf" /etc/logrotate.d/oai) \
 $(glob_files "${ANSIBLE_FILES}/logrotate_rsyslog.conf" /etc/logrotate.d/rsyslog) \
 $(glob_files "${ANSIBLE_FILES}/local-cdn/*" /var/www/local-cdn/) \