* conf/i386-pc.rmk (grub_setup_SOURCES): Add partmap/gpt.c.
(grub_probe_SOURCES): Likewise.
* util/i386/pc/biosdisk.c (grub_util_biosdisk_get_grub_dev): Detect
GPT and initialize dos_part and bsd_part accordingly.
* util/i386/pc/grub-setup.c (setup): Ditto for install_dos_part and
install_bsd_part.
(main): Activate gpt module for use during partition identification,
and deactivate it afterwards.
* util/i386/pc/grub-install.in: Add gpt module to core.img.
* util/i386/pc/grub-probe.c (main): Activate gpt module for use during
partition identification, and deactivate it afterwards.