Hacky auto build for rust yunq.

rust/lib/yellowstone/build.rs

@@ -0,0 +1,18 @@
+use std::process::Command;
+
+fn main() {
+    let out = std::env::var("OUT_DIR").unwrap() + "/yunq.rs";
+
+    let status = Command::new("cargo")
+        .current_dir("../../../yunq/rust")
+        .arg("run")
+        .arg("--")
+        .arg("--input-path")
+        .arg("../../sys/yellowstone/lib/yellowstone/yellowstone.yunq")
+        .arg("--output-path")
+        .arg(out)
+        .status()
+        .expect("Failed to start execution");
+
+    assert!(status.success());
+}