[clang][NFC] Inclusive language: remove use of Whitelist in clang/lib/Analysis/

[quinnp]

Summary

[NFC] As part of using inclusive language within the llvm project, this patch
rewords a comment to replace Whitelist with Allowlist in
RetainSummaryManager.cpp.

[aaron.ballman]

LGTM, thanks for the cleanup!

clang/lib/Analysis/RetainSummaryManager.cpp

if (FName == "pthread_create" || FName == "pthread_setspecific") {
     // libdispatch and XPC finalizers.
     ScratchArgs = AF.add(ScratchArgs, 1, ArgEffect(StopTracking));
     return getPersistentSummary(RetEffect::MakeNoRet(),
                                 ScratchArgs,
                                 ArgEffect(DoNothing), ArgEffect(DoNothing));
   } else if (FName.startswith("NSLog")) {
     return getDoNothingSummary();
   } else if (FName.startswith("NS") && FName.contains("Insert")) {
-    // Whitelist NSXXInsertXX, for example NSMapInsertIfAbsent, since they can
+    // Allowlist NSXXInsertXX, for example NSMapInsertIfAbsent, since they can
     // be deallocated by NSMapRemove. (radar://11152419)
     ScratchArgs = AF.add(ScratchArgs, 1, ArgEffect(StopTracking));
     ScratchArgs = AF.add(ScratchArgs, 2, ArgEffect(StopTracking));
     return getPersistentSummary(RetEffect::MakeNoRet(),
                                 ScratchArgs, ArgEffect(DoNothing),
                                 ArgEffect(DoNothing));
   }