Use needs-unwind instead of ignoring WASM/emscripten

Author: bryangarza

src/test/ui/async-await/track-caller/panic-track-caller.rs

@@ -1,8 +1,6 @@
 // run-pass
 // edition:2021
-
-// ignore-wasm no panic or subprocess support
-// ignore-emscripten no panic or subprocess support
+// needs-unwind
 #![feature(closure_track_caller)]
 
 use std::future::Future;
@@ -73,6 +71,6 @@ fn panicked_at(f: impl FnOnce() + panic::UnwindSafe) -> u32 {
 }
 
 fn main() {
-    assert_eq!(panicked_at(|| block_on(foo())), 43);
-    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 56);
+    assert_eq!(panicked_at(|| block_on(foo())), 41);
+    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 54);
 }