[functional tests] Remove dependency on the ThunderChez library.

I've just moved the relevant code into the functional-tests dir.

functional-tests/srfi/s27/random-bits.sls

@@ -0,0 +1,30 @@
+;; Copyright (c) 2009 Derick Eddington.  All rights reserved.
+;; Licensed under an MIT-style license.  My license is in the file
+;; named LICENSE from the original collection this file is distributed
+;; with.  If this file is redistributed with some other collection, my
+;; license must also be included.
+
+#!r6rs
+(library (srfi s27 random-bits)
+  (export random-integer
+          random-real
+          default-random-source
+          make-random-source
+          random-source?
+          random-source-state-ref
+          random-source-state-set!
+          random-source-randomize!
+          random-source-pseudo-randomize!
+          random-source-make-integers
+          random-source-make-reals)
+  
+  (import (rnrs)
+          (rnrs r5rs)
+          (only (srfi s19 time) time-nanosecond current-time)
+          (srfi s23 error tricks)
+          (srfi private include)
+          )
+    
+   (SRFI-23-error->R6RS "(library (srfi s27 random-bits))"
+    (include/resolve ("srfi" "s27") "random.ss"))
+  )