aarch64: change linker to rust-lld

kernel/aarch64-blog_os.json

@@ -10,11 +10,11 @@
   "arch": "aarch64",
   "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
   "executables": true,
-  "linker": "aarch64-none-elf-ld",
+  "linker": "rust-lld",
-  "linker-flavor": "ld",
+  "linker-flavor": "ld.lld",
   "linker-is-gnu": true,
   "pre-link-args": {
-    "ld": [
+    "ld.lld": [
       "-Tsrc/arch/aarch64/boot/linker.ld"
     ]
   },