GN configs for ipc fuzzer.

tools/ipc_fuzzer/message_dump/BUILD.gn

Index: tools/ipc_fuzzer/message_dump/BUILD.gn
diff --git a/mash/shelf/public/interfaces/BUILD.gn b/tools/ipc_fuzzer/message_dump/BUILD.gn
similarity index 53%
copy from mash/shelf/public/interfaces/BUILD.gn
copy to tools/ipc_fuzzer/message_dump/BUILD.gn
index 9d87ca48f54095da18feaf407768b1bda825ff45..f45340ec9dcab491bbd99e275ba56aaa406c1202 100644
--- a/mash/shelf/public/interfaces/BUILD.gn
+++ b/tools/ipc_fuzzer/message_dump/BUILD.gn
@@ -2,15 +2,12 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//mojo/public/tools/bindings/mojom.gni")
-
-mojom("interfaces") {
-  sources = [
-    "shelf.mojom",
-    "shelf_constants.mojom",
-  ]
-
+loadable_module("ipc_message_dump") {
+  configs += [ "//tools/ipc_fuzzer:ipc_fuzzer_config" ]
   deps = [
-    "//skia/public/interfaces",
+    "//tools/ipc_fuzzer/message_lib:ipc_message_lib",
+  ]
+  sources = [
+    "message_dump.cc",
   ]
 }