postinstall: Use goofiboot's newly corrected --force option

This ensures that even if goofiboot recieves an invalid file system header,
i.e. OEM laptops that inexplicably set BIOS boot flag on an ESP, we still
proceed with the installation, using our fallback paths to disable variables.

This will ensure no more goofiboot installation failures due to ESP verification
failure.

Signed-off-by: Ikey Doherty <[email protected]>

os_installer2/postinstall.py

@@ -817,6 +817,7 @@ def apply_uefi(self):
 
         updated_uefi = False
         for cmd in commands:
+            cmd += " --force"
             try:
                 subprocess.check_call(cmd, shell=True)
                 updated_uefi = True