swift234

[Foundation] Keep NS Updates due to changes in SE-0086

Second pass at updates for SE-0086 feedback

<rdar://problem/26892977> Make sure NSOrderedSet keeps its NS
<rdar://problem/26880016> NSBundleResourceRequest should keep its NS
<rdar://problem/26892958> Make sure NSAttributedString keeps its NS
<rdar://problem/26653694> NSCoder.decodeTopLevelObjectForKey does not follow naming guidelines
<rdar://problem/27355801> Foundation should have a structural type for TextCheckingResult
<rdar://problem/26770611> NSExpression naming is a bit awkward in swift
<rdar://problem/26653451> NSCoder encodeDataObject is misleading
<rdar://problem/26653653> NSCoder decodeObjectOfClass is redundant