luks-support: Fix typo breaking unencrypted builds

debian/patches/Add-luks-support.patch

@@ -62,14 +62,14 @@ index d9a697d..0bf2bd2 100755
              if rootdev:
                  runcmd(['dmsetup', 'remove', rootdev], ignore_fail=True)
 diff --git a/vmdebootstrap/filesystem.py b/vmdebootstrap/filesystem.py
-index 5ca7e5a..3a1422b 100644
+index 5ca7e5a..5b90b23 100644
 --- a/vmdebootstrap/filesystem.py
 +++ b/vmdebootstrap/filesystem.py
 @@ -48,7 +48,9 @@ class Filesystem(Base):
              'boottype': None,
              'roottype': None,
              'swapdev': None,
-+            'lukdsdev': None,
++            'luksdev': None,
          }
 +        self.luks_root = 'crypt_root'