[turbofan] Make new.target explicit in JSCallDescriptor.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 8ab676f39b2a91d13c6567da46fc7370810b952c..0568c36efb3e298ac93c4776753ef5277cf0e8e0 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -24,6 +24,7 @@ const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_r5};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_r6};
 const Register kInterpreterDispatchTableRegister = {Register::kCode_r8};
 const Register kJavaScriptCallArgCountRegister = {Register::kCode_r0};
+const Register kJavaScriptCallNewTargetRegister = {Register::kCode_r3};
 const Register kRuntimeCallFunctionRegister = {Register::kCode_r1};
 const Register kRuntimeCallArgCountRegister = {Register::kCode_r0};