[wasm] Add ProtectedStore instruction

src/compiler/arm64/instruction-selector-arm64.cc

Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index 0eef53c6d510ccb5b3224288fec5b8cdcead6df6..be971f3fa41f106dfe5693c7c07413faafe4f30b 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -708,6 +708,11 @@ void InstructionSelector::VisitStore(Node* node) {
   }
 }
 
+void InstructionSelector::VisitProtectedStore(Node* node) {
+  // TODO(eholk)
+  UNIMPLEMENTED();
+}
+
 // Architecture supports unaligned access, therefore VisitLoad is used instead
 void InstructionSelector::VisitUnalignedLoad(Node* node) { UNREACHABLE(); }