Resolve freetype symbols locally (flutter-tizen#85)

* Revert "Revert "Roll FreeType to 2.10.4 (flutter#23666) (flutter#23887)" (flutter-tizen#60)"

This reverts commit 582f6fe.

* Resolve freetype symbols within the engine binary

* Clean up unused build flag

Author: swift-kim

shell/platform/embedder/BUILD.gn

@@ -275,6 +275,9 @@ shared_library("flutter_engine_library") {
 
   output_name = "flutter_engine"
 
+  # For Tizen 5.5 or older. See the script file for details.
+  ldflags = [ "-Wl,--version-script=" + rebase_path("flutter_engine_exports.lst") ]
+
   if (is_mac && !embedder_for_target) {
     ldflags = [ "-Wl,-install_name,@rpath/FlutterEmbedder.framework/$_framework_binary_subpath" ]
   }

shell/platform/embedder/flutter_engine_exports.lst

@@ -0,0 +1,14 @@
+# Copyright 2021 Samsung Electronics Co., Ltd. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Linker script that hides symbols with the prefix "FT_" so that global freetype
+# symbols referenced by Skia are not overriden by an external shared library at
+# runtime.
+
+{
+  global:
+    *;
+  local:
+    FT_*;
+};

shell/platform/tizen/config.gni

@@ -3,12 +3,6 @@
 # found in the LICENSE file.
 
 declare_args() {
-  # Whether to build the Tizen shell for the host platform, if available.
-  #
-  # By default, the Tizen shell is not built if there is a native toolkit shell,
-  # but it can be enabled for supported platforms (Linux)
-  # as an extra build artifact with this flag. The native toolkit shell will
-  # still be built as well.
+  # Whether to build the Tizen shell.
   build_tizen_shell = false
-  tizen_sdk_4 = false
 }