Update: Set the gnome flashback file variables.

Signed-off-by: debianpepper <pdpdebdevuan@protonmail.com>

python_modules/build_iso.py

@@ -149,6 +149,9 @@ class BuildGflashback(BuildBase):
         """
         arch_suffix = self.sarch[1:]
         cmd_list = None
+        if self.sbase in ["deb", "dev"]:
+            if arch_suffix in ["64", "32", "arm"]:
+                os.system(f'touch {self.sbase.upper()}.{arch_suffix}gfb')
         if arch_suffix in ["64", "32", "arm"]:
             cmd_list = getattr(conf, f"build{arch_suffix}_gfb_build", [])
             for command in cmd_list: