examples: Add dummy Rust VM

Cargo.toml

@@ -2,4 +2,5 @@
 members = [
     "bindings/rust/evmc-sys",
     "bindings/rust/evmc-vm",
+    "examples/example-rust-vm"
 ]

examples/example-rust-vm/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "example-rust-vm"
+version = "0.1.0"
+authors = ["Alex Beregszaszi <alex@rtfs.hu>"]
+edition = "2018"
+
+[lib]
+name = "examplerustvm"
+crate-type = ["staticlib", "dylib"]
+
+[dependencies]
+evmc-vm = { path = "../../bindings/rust/evmc-vm" }

examples/example-rust-vm/src/lib.rs

@@ -0,0 +1,6 @@
+extern crate evmc_vm;
+
+#[no_mangle]
+pub extern "C" fn evmc_create_examplerustvm() -> *const evmc_vm::ffi::evmc_instance {
+    std::ptr::null()
+}