Create a subpackage that places systemd-boot as-if installed. (#39295)

Signed-off-by: Matt Moore <[email protected]>

systemd.yaml

@@ -1,10 +1,13 @@
 package:
   name: systemd
   version: "257.2"
-  epoch: 2
+  epoch: 3
   description: The systemd System and Service Manager
   copyright:
     - license: LGPL-2.1-or-later AND GPL-2.0-or-later
+  resources:
+    cpu: 4
+    memory: 12Gi
 
 vars:
   llvm-vers: 19
@@ -116,6 +119,31 @@ subpackages:
           mkdir -p ${{targets.subpkgdir}}/usr/lib
           cp ${{targets.destdir}}/usr/lib/systemd/libsystemd-shared-*.so  ${{targets.subpkgdir}}/usr/lib/
 
+  - name: "systemd-boot-installed"
+    description: "systemd bootloader (installed for EFI)"
+    pipeline:
+      - runs: |
+          mkdir -p ${{targets.subpkgdir}}/boot/efi/EFI/BOOT/
+      - if: ${{build.arch}} == 'aarch64'
+        runs: |
+          cp ${{targets.destdir}}/usr/lib/systemd/boot/efi/systemd-bootaa64.efi ${{targets.subpkgdir}}/boot/efi/EFI/BOOT/BOOTAA64.EFI
+      - if: ${{build.arch}} == 'x86_64'
+        runs: |
+          cp ${{targets.destdir}}/usr/lib/systemd/boot/efi/systemd-bootx64.efi ${{targets.subpkgdir}}/boot/efi/EFI/BOOT/BOOTX64.EFI
+    test:
+      environment:
+        contents:
+          packages:
+            - file
+            - grep
+      pipeline:
+        - if: ${{build.arch}} == 'aarch64'
+          runs: |
+            file /boot/efi/EFI/BOOT/BOOTAA64.EFI | grep "executable for EFI"
+        - if: ${{build.arch}} == 'x86_64'
+          runs: |
+            file /boot/efi/EFI/BOOT/BOOTX64.EFI | grep "executable for EFI"
+
   - name: "systemd-boot"
     description: "systemd bootloader"
     dependencies: