Move sanitizer and symbol flags out of BUILDCONFIG

chrome/installer/linux/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/features.gni")
+import("//build/config/sanitizers/sanitizers.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
 
 assert(is_linux && is_chrome_branded)
 
 # This target builds all "normal" Linux installers.
 # GYP version: chrome/chrome_installer.gypi:linux_packages_all
 #
 # The bot setup is to build stable, unstable, and beta packages for the current
 # build. Then a later step picks up the package corresponding to what the
@@ skipping 296 matching lines @@
 # Other packages that we support that aren't included in the default "linux"
 # target.
 linux_package("trunk") {
   channel = "trunk"
 }
 if (is_asan) {
   linux_package("asan") {
     channel = "asan"
   }
 }