[ignition] Expect 'I' for signed bytecode operands

test/cctest/interpreter/bytecode_expectations/PropertyCall.golden

Index: test/cctest/interpreter/bytecode_expectations/PropertyCall.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/PropertyCall.golden b/test/cctest/interpreter/bytecode_expectations/PropertyCall.golden
index f0a51af8bd0e040624cd055887a8ee52aee4e61a..38ef6a3fc49dec9e49e25437a55e5a2b898407c1 100644
--- a/test/cctest/interpreter/bytecode_expectations/PropertyCall.golden
+++ b/test/cctest/interpreter/bytecode_expectations/PropertyCall.golden
@@ -500,20 +500,20 @@ bytecodes: [
   /*   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),