overlay coreos/user-patches: Add a patch for sys-apps/pkgcore

sdk_container/src/third_party/coreos-overlay/coreos/user-patches/sys-apps/pkgcore/0001-build-profiles-patch.patch

@@ -0,0 +1,28 @@
+From dd76e415b2a707d31a125201c5d21aadb07282a7 Mon Sep 17 00:00:00 2001
+From: James Le Cuirot <chewi@gentoo.org>
+Date: Tue, 11 Jun 2024 15:39:25 +0100
+Subject: [PATCH] ebuild.profiles: Fix case where a parent path omits the repo
+ identifier
+
+According "SPECIFIC FILE DESCRIPTIONS" in `man portage`, it is valid to
+have a parent path like `:path/to/profile` where the repo identifier is
+missing. This refers to a path in the current repo.
+
+Signed-off-by: James Le Cuirot <chewi@gentoo.org>
+---
+ src/pkgcore/ebuild/profiles.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/pkgcore/ebuild/profiles.py b/src/pkgcore/ebuild/profiles.py
+index 384e41e22..fea1eacc7 100644
+--- a/src/pkgcore/ebuild/profiles.py
++++ b/src/pkgcore/ebuild/profiles.py
+@@ -254,6 +254,8 @@ def parent_paths(self, data):
+                                     f"unknown repo {repo_id!r}"
+                                 )
+                                 continue
++                    else:
++                        location = repo_config.location
+                     l.append(
+                         (
+                             abspath(pjoin(location, "profiles", profile_path)),

sdk_container/src/third_party/coreos-overlay/coreos/user-patches/sys-apps/pkgcore/README.md

@@ -0,0 +1,2 @@
+The `0001-build-profiles-patch.patch` patch can be dropped when we
+update sys-apps/pkgcore to version greater than `0.12.27`.