add(sys-apps/util-linux): Add patched util-linux to support PARTTYPE

This adds support for PARTTYPE in libblkid so cgpt use it instead of
implementing its own partition probing/searching logic.
bump(vboot_reference): Includes resize support in cgpt
Merge pull request #307 from marineam/parttype

add(sys-apps/util-linux): Add patched util-linux to support PARTTYPE