distributed_actor_sil.swift test only fails on asserts builds

Author: slavapestov

test/SIL/Distributed/distributed_actor_sil.swift

@@ -1,6 +1,6 @@
 // RUN: %target-swift-frontend -O -primary-file %s -emit-sil -enable-experimental-distributed | %FileCheck %s -dump-input fail
 
-// XFAIL: *
+// XFAIL: asserts
 // depends on distributed actors initializers not crashing the SIL verifier
 
 import _Distributed