bootstrap dist: ensure LLD's step

src/bootstrap/dist.rs

@@ -2067,6 +2067,12 @@ impl Step for RustDev {
 
         builder.ensure(crate::native::Llvm { target });
 
+        // If the config has LLD enabled, ensure its step. We'll we want to package it, and use it
+        // in download-ci-llvm.
+        if builder.config.lld_enabled {
+            builder.ensure(crate::native::Lld { target });
+        }
+
         let src_bindir = builder.llvm_out(target).join("bin");
         // If updating this list, you likely want to change
         // src/bootstrap/download-ci-llvm-stamp as well, otherwise local users