pmb.config.sudo expects a list of commands + args, so when a string is
passed (e.g. "true"), it results in pmb trying to execute the equivalent
of "$ t r u e":
(8/119) Installing linux-purism-librem5 (6.3.4-r0)
doas: t: command not found
doas: t: command not found
doas: t: command not found
doas: t: command not found
Reviewed-by: Oliver Smith <ollieparanoid@postmarketos.org>
Link: https://lists.sr.ht/~postmarketos/pmbootstrap-devel/%3C20230613141929.15718-1-clayton@craftyguy.net%3E
d6c6e70933