enable target_feature_inline_always in core and std

this is required for compiling `stdarch`

library/core/src/lib.rs

@@ -182,6 +182,7 @@
 #![feature(staged_api)]
 #![feature(stmt_expr_attributes)]
 #![feature(strict_provenance_lints)]
+#![feature(target_feature_inline_always)]
 #![feature(trait_alias)]
 #![feature(transparent_unions)]
 #![feature(try_blocks)]

library/std/src/lib.rs

@@ -309,6 +309,7 @@
 #![feature(staged_api)]
 #![feature(stmt_expr_attributes)]
 #![feature(strict_provenance_lints)]
+#![feature(target_feature_inline_always)]
 #![feature(thread_local)]
 #![feature(try_blocks)]
 #![feature(try_trait_v2)]