main/postmarketos-base-nofde: provide postmarketos-fde-unlocker

This package was supposed to be a provider for postmarketos-fde-unlocker
(see description "Dummy unlocker package for systems without FDE") and
provider_priority=1 (whereas unl0kr has 1000)).

Fix this, so it is in theory possible to install pmOS without unl0kr
again if you want to save a little space and don't need FDE. More
importantly this also fixes bootstrapping a new reposiotry, as we can
now let postmarketos-initramfs makedepend on this package to ensure that
there is one provider for postmarketos-fde-unlocker.

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7118>

main/postmarketos-base-nofde/APKBUILD

@@ -1,12 +1,13 @@
 pkgname=postmarketos-base-nofde
 pkgver=39
-pkgrel=0
+pkgrel=1
 pkgdesc="Dummy unlocker package for systems without FDE"
 url="https://postmarketos.org"
 arch="noarch"
 license="GPL-3.0-or-later"
 options="!check"
 provider_priority=1
+provides="postmarketos-fde-unlocker"
 
 package() {
 	mkdir -p "$pkgdir"