extra-repos/systemd: fix deinstall macro

This wasn't actually working because it was using an unset var when calling 'systemctl disable'.

extra-repos/systemd/systemd/APKBUILD

@@ -5,7 +5,7 @@
 pkgname=systemd
 pkgver=256.5
 _pkgver="musl-v${pkgver//_/-}"
-pkgrel=2
+pkgrel=3
 pkgdesc="System and service manager"
 url="https://github.com/systemd/systemd"
 arch="all !ppc64le !armhf !s390x" # blocked by pmboostrap not supporting
@@ -430,6 +430,6 @@ dev() {
 sha512sums="
 5d1f4625b75b6637afa71519bc7048fe899b4f5785ce26316524ac78941e43cf6ba83391dae68497cfa4f8aaa35d953ec0c04ee581307ffc7007cf4b9d9c4454  systemd-musl-v256.5.tar.gz
 e8ced12eb67a261a5c2788487053451c352e0b2ebe3d72aaf84a3011dc92981affe4f036f693260fc8ee4a49f02de4522fd022e5783dba939023f13891ab228e  4.patch
-73d10e72413c6b688c847c667ccb42ef1f273d498e4b4ff5344dc98432e05aab92bbcd42725935b15f3ebcc627729318ac592c3372cf22465f39ea93a5dedc8b  systemd-apk-macros.sh
+2f9ec875de67fc4bb401bebea88653cd34c22787a26a8122233fbb761bfbf190be72cfa0c26a433c30d703ee1e10489787d75492f0e1a76cbd5f6601e7e23d49  systemd-apk-macros.sh
 81c897fed8a3fbfb67ec591b2398a5d65e4af1b3ef379376c157c98d71f085b707f8ebc896d5571a94f99f8fc84fd6b43e3b879ca9b0d57fc6c4596034c7a777  wired.network
 "