release virtio-queue v0.7.1

[andreeaflorescu]

Summary of the PR

This is a patch release that fixes endianess and the problems with the iterator. In this release we did not update to the latest virtio-bindings version as that would result in a big change. This could cause other problems that would make it hard to consume this otherwise important patch release.

Note that when building locally virtio-queue the latests virtio-bindings will be used, but in production use cases this will not be the case because the v0.1.0 virtio-bindings will be used from crates.io.

Requirements

Before submitting your PR, please make sure you addressed the following requirements:

• [x] All commits in this PR are signed (with git commit -s), and the commit message has max 60 characters for the summary and max 75 characters for each description line.
• [x] All added/changed functionality has a corresponding unit/integration test.
• [x] All added/changed public-facing functionality has entries in the "Upcoming Release" section of CHANGELOG.md (if no such section exists, please create one).
• [x] Any newly added unsafe code is properly documented.

[andreeaflorescu]

@rbradford @stsquad please re-review.