[Test] Xfail stdlib/NSValueBridging.swift

rdar://problem/64995079

Author: nate-chandler

test/stdlib/NSValueBridging.swift.gyb

@@ -15,6 +15,8 @@
 // RUN: %target-codesign %t.out
 // RUN: %target-run %t.out
 // REQUIRES: executable_test
+// rdar://problem/64995079
+// XFAIL: OS=ios && CPU=armv7s
 //
 // REQUIRES: objc_interop