meson: Move all code generation scripts to utils/codegen/

We have multiple code generation scripts in utils/, mixed with other
miscellaneous utilities, as well as a larger code base based on mojom in
utils/ipc/. To make code sharing easier between the generator scripts,
without creating a mess in the utils/ directory, move all the code
generation code to utils/codegen/.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

utils/codegen/ipc/mojo/public/tools/BUILD.gn

@@ -0,0 +1,22 @@
+# Copyright 2020 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# The main target used to aggregate all unit tests for Python-based Mojo tools.
+# This is used to generate a complete isolate which can be pushed to bots to run
+# the tests.
+group("mojo_python_unittests") {
+  data = [
+    "run_all_python_unittests.py",
+    "//testing/scripts/run_isolated_script_test.py",
+  ]
+  deps = [
+    "//mojo/public/tools/bindings:tests",
+    "//mojo/public/tools/mojom:tests",
+    "//mojo/public/tools/mojom/mojom:tests",
+  ]
+  data_deps = [
+    "//testing:test_scripts_shared",
+    "//third_party/catapult/third_party/typ/",
+  ]
+}