unshare: add + to getopt_long()

Signed-off-by: Karel Zak <kzak@redhat.com>
nsenter: add + to getopt_long()

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: add partitions reorder operation to label API

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: (gpt) implement 'fix order' commnad

Signed-off-by: Karel Zak <kzak@redhat.com>
tests: fdisk added an partitions order message (8b60872e)

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>