[nll] librustc_platform_intrinsics: enable feature(nll) for bootstrap

Author: memoryruins

src/librustc_platform_intrinsics/lib.rs

@@ -10,6 +10,8 @@
 
 #![allow(bad_style)]
 
+#![cfg_attr(not(stage0), feature(nll))]
+
 pub struct Intrinsic {
     pub inputs: &'static [&'static Type],
     pub output: &'static Type,