Merge pull request #97 from tsirakisn/fix-upgrade-stable-8

STABLE-8: OXT-1376: installer: Don't create new boot entries on upgrade

Author: eric-ch

part2/stages/Functions/install-main

@@ -628,7 +628,7 @@ copy_to_esp()
 
     do_cmd umount ${ESP_MOUNT} >&2
 
-    if [ -d /sys/firmware/efi/efivars ]; then
+    if [ "${INSTALL_MODE}" = "fresh" ] && [ -d /sys/firmware/efi/efivars ]; then
         create_efi_boot_entries ${ESP}
         return $?
     fi