bootupd: call bootupctl with --update-firmware

This is required to write an entry to the EFI boot manager,
which we ought to do (anaconda does it when installing the
bootloader itself). Without this, boot of the installed system
will only work if it's configured to try and boot from the
hard disk using the fallback path.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

pyanaconda/modules/payloads/payload/rpm_ostree/installation.py

@@ -520,6 +520,7 @@ def _install_bootupd(self):
                 "install",
                 "--auto",
                 "--write-uuid",
+                "--update-firmware",
                 "--device",
                 dev_data.path,
                 "/",