* configure.ac: Accept `x86_64' as host_cpu. In that case add
`-m32' to CFLAGS.
* genmk.rb (class PModule): Always use `$(#{prefix}_LDFLAGS)' when
linking.
* conf/i386-pc.rmk (COMMON_CFLAGS): Add `-m32'.
(COMMON_LDFLAGS): New variable.
(kernel_img_LDFLAGS): Include `COMMON_FLAGS'.
(_chain_mod_LDFLAGS, fshelp_mod_LDFLAGS, fat_mod_LDFLAGS)
(ext2_mod_LDFLAGS, ufs_mod_LDFLAGS, minix_mod_LDFLAGS)
(hfs_mod_LDFLAGS, jfs_mod_LDFLAGS, iso9660_mod_LDFLAGS)
(xfs_mod_LDFLAGS, _linux_mod_LDFLAGS, linux_mod_LDFLAGS)
(normal_mod_LDFLAGS, hello_mod_LDFLAGS, boot_mod_LDFLAGS)
(terminal_mod_LDFLAGS, ls_mod_LDFLAGS, cmp_mod_LDFLAGS)
(cat_mod_LDFLAGS, help_mod_LDFLAGS, reboot_mod_LDFLAGS)
(halt_mod_LDFLAGS, vga_mod_LDFLAGS, font_mod_LDFLAGS)
(terminfo_mod_LDFLAGS, serial_mod_LDFLAGS, _multiboot_mod_LDFLAGS)
(multiboot_mod_LDFLAGS, amiga_mod_LDFLAGS, apple_mod_LDFLAGS)
(pc_mod_LDFLAGS, sun_mod_LDFLAGS, loopback_mod_LDFLAGS)
(default_mod_LDFLAGS, timeout_mod_LDFLAGS, configfile_mod_LDFLAGS)
(vbe_mod_LDFLAGS, vesafb_mod_LDFLAGS, vbeinfo_mod_LDFLAGS)
(vbetest_mod_LDFLAGS, search_mod_LDFLAGS, gzio_mod_LDFLAGS): New
variables.
(normal_mod_ASFLAGS): Add `-m32'.
* include/grub/types.h (grub_host_addr_t, grub_host_off_t)
(grub_host_size_t, grub_host_ssize_t): New types.
(grub_addr_t, grub_off_t, grub_size_t, grub_ssize_t): Make type
dependant of `GRUB_CPU_SIZEOF_VOID_P' instead on
`GRUB_HOST_SIZEOF_VOID_P'.
* include/grub/kernel.h (struct grub_module_header): Type of
member offset changed to `grub_host_off_t'. Type of member size
changed to `grub_host_size_t'.
(struct grub_module_info): Type of member offset changed to
`grub_host_off_t'. Type of member size changed to
`grub_host_size_t'.