pkgctl build - passing options to makepkg

pkgctl build doesn't seem to allow passing of additional CLI options to makepkg. This works fine with other tools e.g. makechrootpkg and extra-x86_64-build. Not only can you pass options, you can also pass environment variables too! This is actually a killer devtools feature IMHO.. therefore it seems kinda like a workflow regression.

Please see this recent discussion. I use a similar technique for bootstrapping toolchains (admittedly, that procedure requires manual use of makechrootpkg).

Consider the following PKGBUILD:

pkgname=foobar
pkgver=1.0
pkgrel=1
pkgdesc=foo
arch=(any)

package() {
  if ((FOO)); then
    echo FOO is set, good.
  else
    echo FOO is not set, bailing...
    return 1
  fi
}

The following invocations all work fine:

$ makepkg -- FOO=1
$ makechrootpkg -r /var/lib/archbuild/extra-x86_64 -- FOO=1
$ extra-x86_64-build -- -- FOO=1

Do we want to continue supporting this? If yes, I can try submitting a MR.