Fix windows test

tests/run-make/windows-binary-no-external-deps/rmake.rs

@@ -2,7 +2,7 @@
 //! a "hello world" application by setting `PATH` to `C:\Windows\System32`.
 //@ only-windows
 
-use run_make_support::{env_var, rustc};
+use run_make_support::{cwd, env_var, rustc};
 use std::path::PathBuf;
 use std::process::Command;
 
@@ -12,7 +12,7 @@ fn main() {
     let windows_dir = env_var("SystemRoot");
     let system32: PathBuf = [&windows_dir, "System32"].iter().collect();
     // Note: This does not use the support wrappers so that we can precisely control the PATH
-    let exe = "hello.exe";
+    let exe = cwd().join("hello.exe");
     let status = Command::new(exe).env("PATH", &system32).spawn().unwrap().wait().unwrap();
     if !status.success() {
         panic!("Command failed!\noutput status: `{status}`");