[Atomics] Make Atomics.store a builtin using TF

src/compiler/code-assembler.h

Index: src/compiler/code-assembler.h
diff --git a/src/compiler/code-assembler.h b/src/compiler/code-assembler.h
index adb321197530710a0d8846286642e94ac833c6e1..b58a5d1329b9bc57c0c899a3e494ecfb115668fe 100644
--- a/src/compiler/code-assembler.h
+++ b/src/compiler/code-assembler.h
@@ -232,6 +232,8 @@ class CodeAssembler {
   Node* StoreNoWriteBarrier(MachineRepresentation rep, Node* base, Node* value);
   Node* StoreNoWriteBarrier(MachineRepresentation rep, Node* base, Node* index,
                             Node* value);
+  Node* AtomicStore(MachineRepresentation rep, Node* base, Node* index,
+                    Node* value);
 
 // Basic arithmetic operations.
 #define DECLARE_CODE_ASSEMBLER_BINARY_OP(name) Node* name(Node* a, Node* b);