[gn] Neutralize dot_gn_symlink.sh hook and replace .gn symlink

This patch neutralize the dot_gn_symlink.sh file and replace the
.gn symlink with the content of build/gn/dotfile.gn

Test: CQ
Change-Id: I229c338d34c1393ecd662fbc9aa04c039429220e

.gn

-build/gn/dotfile.gn
\ No newline at end of file

.gn

+# Copyright 2016 The Fuchsia Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file lives at //build/gn/dotfile.gn for maintenance purposes.
+# It's actually used by GN via a symlink at //.gn, which is installed
+# by a jiri hook.  This file directs GN to all the other key files.
+
+# The location of the build configuration file.
+buildconfig = "//build/config/BUILDCONFIG.gn"
+
+# The secondary source root is a parallel directory tree where
+# GN build files are placed when they can not be placed directly
+# in the source tree, e.g. for third party source trees.
+secondary_source = "//build/secondary/"
+
+# The source root location.
+root = "//build/gn"
+
+# The executable used to execute scripts in action and exec_script.
+script_executable = "/usr/bin/env"
+
+# These arguments override the default values for items in a declare_args
+# block. "gn args" in turn can override these.
+default_args = {
+  # Disable Skia settings not needed for host builds.
+  skia_enable_flutter_defines = true
+  skia_enable_pdf = false
+  skia_use_dng_sdk = false
+  skia_use_expat = false
+  skia_use_fontconfig = false
+  skia_use_libwebp = false
+  skia_use_sfntly = false
+  skia_use_x11 = false
+}
+
+# Enable checking for the layers.
+check_targets = [
+  "//garnet/*",
+  "//peridot/*",
+  "//topaz/*",
+  "//vendor/*",
+  "//zircon/*",
+]

build/dot_gn_symlink.sh

@@ -3,6 +3,5 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-FUCHSIA_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+# do nothing
 
-exec ln -snf build/gn/dotfile.gn "${FUCHSIA_DIR}/.gn"

build/gn/dotfile.gn

-# Copyright 2016 The Fuchsia Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# This file lives at //build/gn/dotfile.gn for maintenance purposes.
-# It's actually used by GN via a symlink at //.gn, which is installed
-# by a jiri hook.  This file directs GN to all the other key files.
-
-# The location of the build configuration file.
-buildconfig = "//build/config/BUILDCONFIG.gn"
-
-# The secondary source root is a parallel directory tree where
-# GN build files are placed when they can not be placed directly
-# in the source tree, e.g. for third party source trees.
-secondary_source = "//build/secondary/"
-
-# The source root location.
-root = "//build/gn"
-
-# The executable used to execute scripts in action and exec_script.
-script_executable = "/usr/bin/env"
-
-# These arguments override the default values for items in a declare_args
-# block. "gn args" in turn can override these.
-default_args = {
-  # Disable Skia settings not needed for host builds.
-  skia_enable_flutter_defines = true
-  skia_enable_pdf = false
-  skia_use_dng_sdk = false
-  skia_use_expat = false
-  skia_use_fontconfig = false
-  skia_use_libwebp = false
-  skia_use_sfntly = false
-  skia_use_x11 = false
-}
-
-# Enable checking for the layers.
-check_targets = [
-  "//garnet/*",
-  "//peridot/*",
-  "//topaz/*",
-  "//vendor/*",
-  "//zircon/*",
-]