[interpreter] Introduce binary op bytecodes for Smi operand.

test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
@@ skipping 58 matching lines @@
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var a = 1; return { val: a, val: a + 1 };
 "
 frame size: 2
 parameter count: 1
-bytecode array length: 22
+bytecode array length: 21
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
                 B(Star), R(0),
   /*   45 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(1),
                 B(Star), R(1),
-                B(LdaSmi), U8(1),
-  /*   67 E> */ B(Add), R(0),
+  /*   67 E> */ B(AddSmi), U8(1), R(0),
                 B(StaNamedPropertySloppy), R(1), U8(1), U8(1),
                 B(Ldar), R(1),
   /*   76 S> */ B(Return),
 ]
 constant pool: [
   InstanceType::FIXED_ARRAY_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]
@@ skipping 352 matching lines @@
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::FIXED_ARRAY_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
 ]
 handlers: [
 ]