virtual/resolvconf: Sync with Gentoo

It's from Gentoo commit 78bc19571bb7aafdcfef136e0f9212df781eec45.

Author: Flatcar Buildbot

sdk_container/src/third_party/portage-stable/virtual/resolvconf/resolvconf-1.ebuild renamed to sdk_container/src/third_party/portage-stable/virtual/resolvconf/resolvconf-2.ebuild

@@ -1,14 +1,15 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=7
+EAPI=8
 
 DESCRIPTION="Virtual to select between different resolvconf providers"
+
 SLOT="0"
 KEYWORDS="~alpha amd64 arm arm64 hppa ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86"
+IUSE="systemd"
 
 RDEPEND="
-	|| (
-		net-dns/openresolv
-		>=sys-apps/systemd-239-r1[resolvconf]
-	)"
+	systemd? ( >=sys-apps/systemd-239-r1[resolvconf] )
+	!systemd? ( net-dns/openresolv )
+"