Add a test/sample program

rust-bindings/rust/sample/src/main.rs

@@ -0,0 +1,16 @@
+extern crate gio;
+extern crate libostree;
+
+use gio::prelude::*;
+use libostree::prelude::*;
+
+fn main() {
+    let repo = libostree::Repo::new(&gio::File::new_for_path("test-repo"));
+
+    let result = repo.create(libostree::RepoMode::Archive, Option::None);
+
+    result.expect("we did not expect this to fail :O");
+
+    let path = repo.get_path();
+    println!("path: {}", path.unwrap().get_path().unwrap().to_str().unwrap());
+}