* include/grub/script.h (grub_script_cmdif): Renamed field 'bool' to
'exec_to_evaluate'. Renamed field 'true' to 'exec_on_true'. Renamed
field 'false' to 'exec_on_false'.
(grub_script_create_cmdif): Renamed argument names to reflect above
changes.
* normal/execute.c (grub_script_execute_cmdif): Likewise.
* normal/script.c (grub_script_create_cmdif): Likewise.