Rollup merge of rust-lang#80434 - pietroalbini:tarball-temp-dir, r=Ma…

…rk-Simulacrum

bootstrap: put the component name in the tarball temp dir path

This should not matter right now, but if we ever parallelize rustbuild this will avoid tarball contents being merged together.

r? `@Mark-Simulacrum`

src/bootstrap/tarball.rs

@@ -112,7 +112,7 @@ impl<'a> Tarball<'a> {
     fn new_inner(builder: &'a Builder<'a>, component: &str, target: Option<String>) -> Self {
         let pkgname = crate::dist::pkgname(builder, component);
 
-        let mut temp_dir = builder.out.join("tmp").join("tarball");
+        let mut temp_dir = builder.out.join("tmp").join("tarball").join(component);
         if let Some(target) = &target {
             temp_dir = temp_dir.join(target);
         }