[Interpreter] Remove separate Ignition snapshot.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index dc36fca8d78b11cf97001faf5d7c231edb9a212f..d7b98dc61c5aeba06bb2e8bc9ca0ff9c05463eba 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -187,7 +187,7 @@ config("toolchain") {
   }
   if (v8_target_arch == "s390") {
     defines += [ "V8_TARGET_ARCH_S390" ]
-  } 
+  }
   if (v8_target_arch == "s390x") {
     defines += [
       "V8_TARGET_ARCH_S390",
@@ -200,7 +200,7 @@ config("toolchain") {
   if (v8_target_arch == "x64") {
     defines += [ "V8_TARGET_ARCH_X64" ]
   }
-     
+
   if (is_win) {
     defines += [ "WIN32" ]
     # TODO(jochen): Support v8_enable_prof.
@@ -491,6 +491,7 @@ action("run_mksnapshot") {
     "./" + rebase_path(get_label_info(":mksnapshot($snapshot_toolchain)",
                                       "root_out_dir") + "/mksnapshot",
                        root_build_dir),
+    "--ignition",
     "--log-snapshot-positions",
     "--logfile",
     rebase_path("$target_gen_dir/snapshot.log", root_build_dir),