Move files from the secondary GN directory to build.

tools/gn/secondary/build/config/clang/BUILD.gn

Index: tools/gn/secondary/build/config/clang/BUILD.gn
diff --git a/tools/gn/secondary/build/config/clang/BUILD.gn b/tools/gn/secondary/build/config/clang/BUILD.gn
deleted file mode 100644
index d083e86c11b452113f8b04bbe02be8aa45385151..0000000000000000000000000000000000000000
--- a/tools/gn/secondary/build/config/clang/BUILD.gn
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright (c) 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-config("find_bad_constructs") {
-  cflags = [
-    "-Xclang", "-load",
-    "-Xclang",
-
-    # TODO(brettw) express this in terms of a relative dir from the output.
-    # for now, assume the output dir is two levels deep under the source
-    # (like "out/Debug").
-    "../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib",
-
-    "-Xclang", "-add-plugin",
-    "-Xclang", "find-bad-constructs",
-  ]
-}