devmapper uses xfs by default now. So include xfsprogs in build environment. Also update docs to reflect the new default. Signed-off-by: Anusha Ragunathan <anusha@docker.com>
devmapper uses xfs by default now. So include xfsprogs in build environment. Also update docs to reflect the new default. Signed-off-by: Anusha Ragunathan <anusha@docker.com>