bootloader: Add grub-efi-luks2-bootloader.

* rosenthal/bootloader/grub.scm: New file.
(grub-efi-luks2-bootloader): New variable.

rosenthal/bootloader/grub.scm

@@ -0,0 +1,16 @@
+;; SPDX-FileCopyrightText: 2023 Hilton Chain <hako@ultrarare.space>
+;;
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+(define-module (rosenthal bootloader grub)
+  #:use-module (gnu bootloader)
+  #:use-module (gnu bootloader grub)
+  #:use-module (gnu packages bootloaders)
+  #:use-module (rosenthal packages bootloaders)
+  #:export (grub-efi-luks2-bootloader))
+
+(define grub-efi-luks2-bootloader
+  (bootloader
+   (inherit grub-efi-bootloader)
+   (name 'grub-efi-luks2-bootloader)
+   (package grub-efi-luks2)))