[build] Add v8gen support for PPC/s390 architecture

tools/get_byteorder.py

Index: tools/get_byteorder.py
diff --git a/tools/get_byteorder.py b/tools/get_byteorder.py
new file mode 100755
index 0000000000000000000000000000000000000000..598948b42ab0dc0e46a720e289e3733795ba7fcd
--- /dev/null
+++ b/tools/get_byteorder.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+#
+# Copyright 2017 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Get Byteorder of host architecture"""
+
+
+import sys
+
+def main():
+  print sys.byteorder
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main())