[ignition] Expect 'I' for signed bytecode operands

test/cctest/interpreter/bytecode_expectations/PropertyCall.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 wrap: no
 test function name: f
 
 ---
 snippet: "
@@ skipping 482 matching lines @@
   f(new (function Obj() { this.func = function(a) { return this; }})())
 "
 frame size: 5
 parameter count: 2
 bytecode array length: 55
 bytecodes: [
   /*   10 E> */ B(StackCheck),
   /*   16 S> */ B(Nop),
   /*   24 E> */ B(LdaNamedProperty), R(arg0), U8(0), U8(8),
                 B(Star), R(2),
-                B(LdaSmi), U8(1),
+                B(LdaSmi), I8(1),
                 B(Star), R(4),
                 B(Mov), R(arg0), R(3),
   /*   25 E> */ B(CallProperty), R(2), R(3), U8(2), U8(6),
                 B(Star), R(2),
   /*   32 E> */ B(LdaNamedProperty), R(2), U8(0), U8(10),
                 B(Star), R(1),
-                B(LdaSmi), U8(2),
+                B(LdaSmi), I8(2),
                 B(Star), R(3),
   /*   33 E> */ B(CallProperty), R(1), R(2), U8(2), U8(4),
                 B(Star), R(1),
   /*   40 E> */ B(LdaNamedProperty), R(1), U8(0), U8(12),
                 B(Star), R(0),
-                B(LdaSmi), U8(3),
+                B(LdaSmi), I8(3),
                 B(Star), R(2),
   /*   41 E> */ B(CallProperty), R(0), R(1), U8(2), U8(2),
   /*   50 S> */ B(Return),
 ]
 constant pool: [
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["func"],
 ]
 handlers: [
 ]