Add Intl resource bundle files for big-endian architecture.

Little and Big endian files have their own designated folder.
Both use the ASCII charset family.
We may want to add a big-endian/EBCDIC charset family resource bundle in the future.

The build script is currently left untouched as it seems to mostly be for Windows.

ext/intl/tests/resourcebundle.build

@@ -1,4 +1,5 @@
 <?php
+// FIXME Add handling for big endian archs
 // THIS SCRIPT WILL REBUILD ResourceBundle bundles from source files
 
 // DEFINE YOUR ICU TOOLS PATH HERE

ext/intl/tests/resourcebundle.inc

@@ -1,5 +1,13 @@
 <?php
-define('BUNDLE', dirname(__FILE__)."/_files/resourcebundle");
+// FIXME Improve Endian check when endian const gets added
+// Check if platform is Big or Little endian
+if (pack('S', 0xABCD) !== pack('v', 0xABCD)) {
+    $endian = 'be';
+} else {
+    $endian = 'le';
+}
+
+define('BUNDLE', __DIR__ . '/_files/resourcebundle_' . $endian);
 
 function debug( $res ) {
     if (is_null( $res )) {