[gnome-build-meta/abderrahim/iso] iso/signed-image.bst: use the variant for the before last component

[Abderrahim Kitouni <akitouni src gnome org>]

commit cd7392f28b4683497b3e63b974bf8dd72eb10a05
Author: Abderrahim Kitouni <akitouni gnome org>
Date:   Fri Sep 11 16:18:05 2020 +0100

    iso/signed-image.bst: use the variant for the before last component
    
    This component doesn't matter to the installer, and contains the date and
    time in Endless OS.
    
    Putting the branch there is problematic as the field can't contain a dot
    while our versions do.

 elements/iso/signed-image.bst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/elements/iso/signed-image.bst b/elements/iso/signed-image.bst
index 8a253097..21c561e0 100644
--- a/elements/iso/signed-image.bst
+++ b/elements/iso/signed-image.bst
@@ -7,7 +7,7 @@ build-depends:
 variables:
   install-root: /images
   # This name format is required by eos-installer
-  basename: 'GNOMEOS-%{branch}-%{arch}-%{arch}.%{branch}.base'
+  basename: 'GNOMEOS-%{branch}-%{arch}-%{arch}.%{ostree-layer}.base'
 
 environment:
   GNUPGHOME: /tmp/gpg