XFAIL the vImage test, as it's falling over for arm64.

stephentyrone · stephentyrone · commit 4dc72c7df9bf · 2019-04-26T11:59:04.000-04:00
diff --git a/test/stdlib/Accelerate_vImage.swift b/test/stdlib/Accelerate_vImage.swift
@@ -1,6 +1,7 @@
 // RUN: %target-run-simple-swift
 // REQUIRES: executable_test
 
+// REQUIRES: rdar50244151
 // REQUIRES: objc_interop
 // UNSUPPORTED: OS=watchos
 
