Fix up 08c2a7a for 32-bit platforms. (#10433)

...where swift::TwoWordPair is defined a little less freely.

Author: jrose-apple

stdlib/public/SDK/Foundation/CheckClass.mm

@@ -56,8 +56,9 @@ static void logIfFirstOccurrence(Class objcClass, void (^log)(void)) {
     template <size_t N>
     StringRefLite(const char (&staticStr)[N]) : data(staticStr), length(N) {}
 
-    StringRefLite(swift::TwoWordPair<const char *, uintptr_t> pair)
-        : data(pair.first), length(pair.second) {}
+    StringRefLite(swift::TwoWordPair<const char *, uintptr_t>::Return rawValue)
+        : data(swift::TwoWordPair<const char *, uintptr_t>(rawValue).first),
+          length(swift::TwoWordPair<const char *, uintptr_t>(rawValue).second){}
 
     NS_RETURNS_RETAINED
     NSString *newNSStringNoCopy() const {