[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 3e5264dd94ab154bdbd2f775e75175f0164df2c7..1e234c5a03d86efbf7ea029a1f63cc607c84e2e0 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -3704,6 +3704,9 @@ 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() {