Fix unreachable_pub lint for hermit target

Author: thaliaarchi

Diff for: library/panic_unwind/src/hermit.rs

@@ -7,14 +7,14 @@ use core::any::Any;
 
 pub(crate) unsafe fn cleanup(_ptr: *mut u8) -> Box<dyn Any + Send> {
     extern "C" {
-        pub fn __rust_abort() -> !;
+        fn __rust_abort() -> !;
     }
     __rust_abort();
 }
 
 pub(crate) unsafe fn panic(_data: Box<dyn Any + Send>) -> u32 {
     extern "C" {
-        pub fn __rust_abort() -> !;
+        fn __rust_abort() -> !;
     }
     __rust_abort();
 }