Update to Random_Compat 1.0.9.

This update includes fixes for Windows support & libSodium support, and removes the `Throwable` Polyfill due to PHP7 incompatibilities. 

Fixes #28633

Built from https://develop.svn.wordpress.org/trunk@35365


git-svn-id: http://core.svn.wordpress.org/trunk@35330 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/random_compat/random_bytes_com_dotnet.php

@@ -39,9 +39,11 @@
  */
 function random_bytes($bytes)
 {
-    if (!is_int($bytes)) {
+    try {
+        $bytes = RandomCompat_intval($bytes);
+    } catch (TypeError $ex) {
         throw new TypeError(
-            'Length must be an integer'
+            'random_bytes(): $bytes must be an integer'
         );
     }
     if ($bytes < 1) {