Based on encrypted-home-os, this test verifies unlocking via a key file.
* gnu/tests/install.scm (%encrypted-home-os-key-file),
(%encrypted-home-os-key-file-source): New variables.
(%test-encrypted-home-os-key-file): New exported variables.
(%encrypted-home-installation-script): Generate initrd with a key file for
unlocking the LUKS.
Change-Id: I04460155284bdef7e18da645f2b4b26bd8e86636
Signed-off-by: Ludovic Courtès <ludo@gnu.org>