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


git-svn-id: https://develop.svn.wordpress.org/trunk@35365 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/random_compat/random_bytes_dev_urandom.php

@@ -74,9 +74,11 @@ function random_bytes($bytes)
             stream_set_read_buffer($fp, RANDOM_COMPAT_READ_BUFFER);
         }
     }
-    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) {