Update dependencies

[arigo-vos]

Summary of the PR

This is a pull request that update the vmm-reference crate dependencies to:

• linux-loader to 0.10.0. At the moment this dependency must be checked-out locally (linux-loader = { version = "0.10.0", path = "../linux-loader" } in Cargo.toml) as it requires one commit that must be merged upstream. For this, I created another pull request. As soon as the commit will be upstreamed I'll update this pull request to pull linux-loader directly from github.
• vm-memory 0.13.1
• kvm-ioctls 0.13.0
• kvm-bindings 0.6
• vmm-sys-util 0.11.2
• event-manager 0.3.0

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]

@arigo-vos The tests are failing, can you please fix them?

[arigo-vos]

@arigo-vos The tests are failing, can you please fix them?

Ouch. I think some of the errors are due to the fact linux-loader is included from a local folder as it required a commit for which I created another pull request. Should I instead include this dependency via a temporary github repository? Give me a couple of working days.