[Interpreter] Ensure ValueOf is only called once for post-increment operations.

test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 wrap: yes
 
 ---
 snippet: "
   var x = 0, y = 1;
@@ skipping 224 matching lines @@
 handlers: [
 ]
 
 ---
 snippet: "
   var x = 17;
   return 1 + x + (x++) + (++x);
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 41
+bytecode array length: 43
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(17),
                 B(Star), R(0),
   /*   46 S> */ B(LdaSmi), U8(1),
                 B(Star), R(1),
                 B(Ldar), R(0),
   /*   57 E> */ B(Add), R(1), U8(2),
                 B(Star), R(1),
                 B(Ldar), R(0),
                 B(ToNumber), R(2),
+                B(Ldar), R(2),
                 B(Inc), U8(3),
                 B(Star), R(0),
                 B(Ldar), R(2),
   /*   63 E> */ B(Add), R(1), U8(4),
                 B(Star), R(1),
                 B(Ldar), R(0),
                 B(Inc), U8(5),
                 B(Star), R(0),
   /*   72 E> */ B(Add), R(1), U8(6),
   /*   76 S> */ B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]