libblkid: move MBR partition types to include/

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) use stuff ffrom pt-mbr.h and libfdisk

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) fix checksum calculation

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) use ask API for first/last dialogs

Signed-off-by: Karel Zak <kzak@redhat.com>