* include/grub/types.h (grub_host_addr_t): Rename to
grub_target_addr_t.
(grub_host_off_t): Rename to grub_target_off_t.
(grub_host_size_t): Rename to grub_target_size_t.
(grub_host_ssize_t): Rename to grub_target_ssize_t.
Refer to GRUB_TARGET_SIZEOF_VOID_P to define those variables.
* include/grub/kernel.h (struct grub_module_header): Change type
of OFFSET to grub_target_off_t and type of SIZE to grub_target_size_t.
(grub_module_info): Likewise.