[Atomics] Make Atomics.store a builtin using TF

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 47a4e25002def49e51338194e7daa704e13a52e4..744da8f7055263eb45dbca4c7fa8d6eea872d778 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -137,6 +137,10 @@ class RawMachineAssembler {
   Node* AtomicLoad(MachineType rep, Node* base, Node* index) {
     return AddNode(machine()->AtomicLoad(rep), base, index);
   }
+  Node* AtomicStore(MachineRepresentation rep, Node* base, Node* index,
+                    Node* value) {
+    return AddNode(machine()->AtomicStore(rep), base, index, value);
+  }
 
   // Arithmetic Operations.
   Node* WordAnd(Node* a, Node* b) {