[ignition] Add a reverse bytecode iterator

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index bb062463a1e5c0ed71da6e51004be594355811a1..ec73657f642652df18cf245912728657a39377ce 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1446,6 +1446,8 @@ v8_source_set("v8_base") {
     "src/interpreter/bytecode-array-builder.h",
     "src/interpreter/bytecode-array-iterator.cc",
     "src/interpreter/bytecode-array-iterator.h",
+    "src/interpreter/bytecode-array-reverse-iterator.cc",
+    "src/interpreter/bytecode-array-reverse-iterator.h",
     "src/interpreter/bytecode-array-writer.cc",
     "src/interpreter/bytecode-array-writer.h",
     "src/interpreter/bytecode-dead-code-optimizer.cc",