[Interpreter] Add implementations of arithmetic binary op bytecodes.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 24fec96bfa47bd0a76feaea9ce815f6b458f0282..bb1c69bd87ec327a248887467b8f52a1a6fe2c0e 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -193,6 +193,8 @@ Bytecode BytecodeArrayBuilder::BytecodeForBinaryOperation(Token::Value op) {
       return Bytecode::kMul;
     case Token::Value::DIV:
       return Bytecode::kDiv;
+    case Token::Value::MOD:
+      return Bytecode::kMod;
     default:
       UNIMPLEMENTED();
       return static_cast<Bytecode>(-1);