[Atomics] Make Atomics.exchange a builtin using TF

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index c99cadc481d0718e3bda6ee5b55c836e68392063..4ff807b0c8504461995a71a46ce72f3e1b8f48f1 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -3487,6 +3487,9 @@ void Genesis::InitializeGlobal_harmony_sharedarraybuffer() {
                         Builtins::kAtomicsLoad, 2, true);
   SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("store"),
                         Builtins::kAtomicsStore, 3, true);
+  SimpleInstallFunction(atomics_object,
+                        factory->InternalizeUtf8String("exchange"),
+                        Builtins::kAtomicsExchange, 3, true);
 }