releng: copy UEFI shell from airootfs instead of the host system

Fixes https://gitlab.archlinux.org/archlinux/archiso/-/issues/35 .

README.rst

@@ -14,7 +14,6 @@ The following packages need to be installed to be able to create an image with t
 * arch-install-scripts
 * dosfstools
 * e2fsprogs
-* edk2-shell
 * libisoburn
 * squashfs-tools
 

configs/releng/build.sh

@@ -204,7 +204,7 @@ make_efi() {
 
     # edk2-shell based UEFI shell
     # shellx64.efi is picked up automatically when on /
-    cp /usr/share/edk2-shell/x64/Shell_Full.efi "${work_dir}/iso/shellx64.efi"
+    cp "${work_dir}/x86_64/airootfs/usr/share/edk2-shell/x64/Shell_Full.efi" "${work_dir}/iso/shellx64.efi"
 }
 
 # Prepare efiboot.img::/EFI for "El Torito" EFI boot mode

configs/releng/packages.x86_64

@@ -17,6 +17,7 @@ diffutils
 dmraid
 dnsmasq
 dosfstools
+edk2-shell
 efibootmgr
 ethtool
 exfat-utils