disable VecDeque test until the fix lands in rustc

RalfJung · RalfJung · commit 9e295d134606 · 2018-12-02T23:24:08.000+01:00
diff --git a/tests/run-pass-fullmir/vecdeque.rs b/tests/run-pass-fullmir/vecdeque.rs
@@ -1,3 +1,6 @@
+// FIXME: Validation disabled until https://github.com/rust-lang/rust/pull/56161 lands
+// compile-flags: -Zmiri-disable-validation
+
 use std::collections::VecDeque;
 
 fn main() {
