Add support for UFS version 1 and 2. Add support for the minix
filesystem version 1 and 2, both the variants with 14 and 30 long
filenames.
* conf/i386-pc.rmk (grub_setup_SOURCES): Add fs/ufs.c and
fs/minix.c.
(grub_emu_SOURCES): Likewise.
(pkgdata_MODULES): Add ufs.mod and minix.mod.
(ufs_mod_SOURCES): New variable.
(ufs_mod_CFLAGS): Likewise.
(minix_mod_SOURCES): Likewise.
(minix_mod_CFLAGS): Likewise.
* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Add fs/ufs.c and
fs/minix.c.
(grubof_SOURCES): Likewise.
* fs/ufs.c: New file.
* fs/minix.c: New file.
* include/grub/fs.h (grub_ufs_init): New prototype.
(grub_ufs_fini): Likewise.
(grub_minix_init): Likewise.
(grub_minix_fini): Likewise.
* util/grub-emu.c (main): Initialize and deinitialize UFS and
minix fs.
