virtio-queue v0.7.1

Fixed

• Skip indirect descriptor address alignment check, the virtio spec has no alignment requirement on this, see 2.6.5.3 Indirect Descriptors and 2.7.7 Indirect Flag: Scatter-Gather Support in virtio 1.0.
• Update the add_desc_chains mock function such that it works on big endian hosts as well.
• Check that the queue is ready for processing requests when calling the iterator functions. For now the checks are limited to the avail address and the ready fields, but should be extended in the future to account for other fields that could signal an invalid queue. This behavior can be triggered by doing a reset followed by a pop_descriptor_chain.