meson: Always build bootctl

bootctl is rather useful to have, even if on a system without UEFI,
as it has a number of verbs that are unrelated to UEFI (e.g kernel-identify),
and more importantly, it supports --root to operate on directory trees
(which could be intended to be deployed on UEFI) so let's make sure we
always build it.

src/boot/meson.build

@@ -27,7 +27,6 @@ executables += [
                 'public' : true,
                 'conditions' : [
                           'HAVE_BLKID',
-                          'ENABLE_BOOTLOADER',
                 ],
                 'sources' : bootctl_sources,
                 'link_with' : boot_link_with,