Updates required for latest ICU BUILD.gn. (flutter#97)

build/config/android/config.gni

@@ -45,6 +45,9 @@ if (is_android) {
 
     # Set to true to enable the Errorprone compiler
     use_errorprone_java_compiler = false
+
+    # Unused. Required for GN files maintained in other buildroots.
+    enable_java_templates = false
   }
 
   # Host stuff -----------------------------------------------------------------

build/config/host_byteorder.gni

@@ -0,0 +1,27 @@
+# Copyright (c) 2017 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.
+
+# This header file defines the "host_byteorder" variable.
+# Not that this is currently used only for building v8.
+# The chromium code generally assumes little-endianness.
+declare_args() {
+  host_byteorder = "undefined"
+}
+
+# Detect host byteorder
+# ppc64 can be either BE or LE
+if (host_cpu == "ppc64") {
+  if (current_os == "aix") {
+    host_byteorder = "big"
+  } else {
+    # Only use the script when absolutely necessary
+    host_byteorder =
+        exec_script("//build/config/get_host_byteorder.py", [], "trim string")
+  }
+} else if (host_cpu == "ppc" || host_cpu == "s390" || host_cpu == "s390x" ||
+           host_cpu == "mips" || host_cpu == "mips64") {
+  host_byteorder = "big"
+} else {
+  host_byteorder = "little"
+}