* conf/common.rmk (grub_modules_init.lst): Use `-printf "%P\n"'
and `cd' to make sure the filename is not prefixed with a
directory name.
(pkgdata_MODULES): Add `gpt.mod'.
(gpt_mod_SOURCES): New variable.
(gpt_mod_CFLAGS): Likewise.
(gpt_mod_LDFLAGS): Likewise.
* conf/i386-pc.rmk (grub_emu_SOURCES): Add `partmap/gpt.c'.
* include/grub/pc_partition.h (GRUB_PC_PARTITION_TYPE_GPT_DISK):
New macro.
* partmap/gpt.c: New file.
* partmap/pc.c (pc_partition_map_iterate): Don't continue when a
GPT partition map is detected.
