Use sysroot for dpkg-shlibdeps when building debian package

chrome/installer/linux/BUILD.gn

Index: chrome/installer/linux/BUILD.gn
diff --git a/chrome/installer/linux/BUILD.gn b/chrome/installer/linux/BUILD.gn
index d1c811477d6413bb55183c515f748ac5379d7b76..f580089dbf34d03491c2df8d6376599889990f61 100644
--- a/chrome/installer/linux/BUILD.gn
+++ b/chrome/installer/linux/BUILD.gn
@@ -5,6 +5,7 @@
 import("//build/config/chrome_build.gni")
 import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
+import("//build/config/sysroot.gni")
 import("//build/util/process_version.gni")
 import("//build/util/version.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
@@ -280,6 +281,8 @@ template("linux_package") {
       invoker.channel,
       "-d",
       branding_path_component,
+      "-s",
+      rebase_path(sysroot),
     ]
     deps = [
       ":installer_deps",