[infra] Translate _sources.gypi files to _sources.gni files

runtime/lib/typed_data_sources.gypi

Index: runtime/lib/typed_data_sources.gypi
diff --git a/runtime/lib/typed_data_sources.gypi b/runtime/lib/typed_data_sources.gypi
deleted file mode 100644
index d68daed967d53807c48af2af9a5e973311cb96f7..0000000000000000000000000000000000000000
--- a/runtime/lib/typed_data_sources.gypi
+++ /dev/null
@@ -1,13 +0,0 @@
-# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-# Sources visible via dart:typed_data library.
-
-{
-  'sources': [
-    'typed_data.cc',
-    'typed_data_patch.dart',
-    'simd128.cc',
-  ],
-}