[Interpreter] Preserve source positions in peephole optimizer.

test/cctest/interpreter/bytecode_expectations/LogicalExpressions.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: number
 execute: yes
 wrap: yes
 
 ---
@@ skipping 101 matching lines @@
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var a = 2, b = 3, c = 4; return a || (a, b, a, b, c = 5, 3);
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 24
+bytecode array length: 30
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(2),
   /*   42 E> */ B(Star), R(0),
   /*   49 S> */ B(LdaSmi), U8(3),
   /*   49 E> */ B(Star), R(1),
   /*   56 S> */ B(LdaSmi), U8(4),
   /*   56 E> */ B(Star), R(2),
   /*   59 S> */ B(Ldar), R(0),
-                B(JumpIfToBooleanTrue), U8(8),
+                B(JumpIfToBooleanTrue), U8(14),
+  /*   72 E> */ B(Ldar), R(0),
+  /*   75 E> */ B(Ldar), R(1),
+  /*   78 E> */ B(Ldar), R(0),
   /*   81 E> */ B(LdaSmi), U8(5),
   /*   86 E> */ B(Star), R(2),
                 B(LdaSmi), U8(3),
   /*   95 S> */ B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]
 
@@ skipping 797 matching lines @@
                 B(JumpIfToBooleanTrue), U8(3),
                 B(LdaZero),
                 B(LdaSmi), U8(1),
   /*   68 S> */ B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]