For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64.

BUILD.gn

 # Copyright 2014 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/host_byteorder.gni")
 import("//third_party/icu/config.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 if (is_mac) {
   import("//build/config/sanitizers/sanitizers.gni")
 }
 
@@ skipping 962 matching lines @@
 
 # TODO(GYP): Gyp has considerations here for QNX and for the host toolchain
 #  that have not been ported over.
 if (is_android) {
   data_dir = "android"
 } else if (is_ios) {
   data_dir = "ios"
 } else {
   data_dir = "common"
 }
-# TODO(GYP): Support to use host byteorder to select the icu date file
-if (current_cpu == "mips" || current_cpu == "mips64") {
+
+if (current_cpu == "mips" || current_cpu == "mips64" ||
+    host_byteorder == "big") {
   data_bundle_prefix = "icudtb"
 } else {
   data_bundle_prefix = "icudtl"
 }
 data_bundle = "${data_bundle_prefix}.dat"
 
 # TODO(GYP) support use_system_icu.
 if (icu_use_data_file) {
   if (is_ios) {
     bundle_data("icudata") {
@@ skipping 36 matching lines @@
       }
     }
 
     source_set("icudata") {
       sources = [ "$data_assembly" ]
       defines = [ "U_HIDE_DATA_SYMBOL" ]
       deps = [ ":make_data_assembly", ]
     }
   }
 }