[stdlib] XFAIL RangeTraps.CountablePartialRangeFrom in resilient mode

[airspeedswift]

Here’s the test that’s failing, but is passing on other build configs:

let range = (Int.max - 1)...
var it = range.makeIterator()
_ = it.next()
expectCrashLater()
_ = it.next()

So it failing means in this build advanced(by: 1) on Int.max, which is what it.next() on a CountablePartialRangeFrom will be calling, isn’t trapping.

[airspeedswift]

@swift-ci please smoke test and merge

[airspeedswift]

@swift-ci please smoke test linux platform

[swiftix]

@airspeedswift Have you filed a radar for this issue?

[aschwaighofer]

@swiftix rdar://31909976