[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 7e0800b0d17f008b47db594a1a0a4ecf76e5ff1b..613068d477ff38e13f60a9511f72d09c4ea78d92 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -3711,6 +3711,9 @@ 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);
 }
 
 void Genesis::InitializeGlobal_harmony_array_prototype_values() {