!480 【FIX】x64 current cpu config适配

Merge pull request !480 from 烈烈/zidl

musl_config.gni

@@ -8,7 +8,7 @@ declare_args() {
     musl_arch = "arm"
   } else if (current_cpu == "arm64") {
     musl_arch = "aarch64"
-  } else if (current_cpu == "x86_64") {
+  } else if (current_cpu == "x86_64" || current_cpu == "x64") {
     musl_arch = "x86_64"
   }
   # musl_root = "$root_out_dir/obj/third_party/musl"