Add Rust bindings to master branch (#1401)

* Rust bindings (#1295)

* rust bindings init

* updated bindings/README

* Improved Rust bindings: (#1309)

* Added basic block hooking
* Changed confusing struct naming. Before: Protection::All -> R,W,X, Now: Permission::All -> R,W,X
* Fixed issue with remove_hook(..). Implementation tried to remove hook from incorrect hashmap.
* Made unused private vmmap(..) public.

* Improve Rust bindings (#1367)

* fixed tests

* constant readability

* HookType as bitflags

* Mode as bitflags

* improve bitflags

* cargo fmt

* removed unnecessary "as usize"

* fixed buggy deallocation of uc_context structs

* Remove data field in rust bindings

Co-authored-by: Lukas Seidel <pr0me@users.noreply.github.com>
Co-authored-by: Nikolas Eller <nikolas.e@mail.de>
Co-authored-by: Simon Wörner <git@simon-woerner.de>
Co-authored-by: floesen <floesen@users.noreply.github.com>

bindings/README

@@ -1,4 +1,4 @@
-This directory contains bindings & test code for Python, Java, Go and .NET.
+This directory contains bindings & test code for Python, Java, Go, .NET and Rust.
 See <language>/README or <language>/README.TXT or <language>/README.md for how to install each binding.
 
 The following bindings are contributed by community.
@@ -10,13 +10,14 @@ The following bindings are contributed by community.
 - Haskell binding: by Adrian Herrera.
 - VB6 binding: David Zimmer.
 - FreePascal/Delphi binding: Mohamed Osama.
+- Rust binding: Lukas Seidel.
 
 More bindings created & maintained externally by community are available as follows.
 
 - UnicornPascal: Delphi/Free Pascal binding (by Stievie).
     https://github.com/stievie/UnicornPascal
 
-- Unicorn-Rs: Rust binding (by Sébastien Duquette)
+- Unicorn-Rs: Rust binding (by Sébastien Duquette, unmaintained)
     https://github.com/ekse/unicorn-rs
 
 - UnicornEngine: Perl binding (by Vikas Naresh Kumar)