the test requires unwinding so we don't run it on the wasm32-bare target

Author: japaric

src/test/run-pass/panic-uninitialized-zeroed.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-wasm32-bare always compiled as panic=abort right now and this requires unwinding
 // This test checks that instantiating an uninhabited type via `mem::{uninitialized,zeroed}` results
 // in a runtime panic.