Fix compilation of literal bitvectors.

* libguile/arrays.c (scm_from_contiguous_typed_array): Fix BYTE_LEN
  sanity check for bitvectors.

* test-suite/tests/unif.test ("syntax")["bitvector is self-evaluating"]:
  New test.

* module/ice-9/deprecated.scm (#\y): Fix deprecation comment: `#*' is
  not a read syntax.

test-suite/tests/unif.test

@@ -17,7 +17,8 @@
 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
 (define-module (test-suite test-unif)
-    #:use-module (test-suite lib))
+  #:use-module ((system base compile) #:select (compile))
+  #:use-module (test-suite lib))
 
 ;;;
 ;;; array?
@@ -546,8 +547,10 @@
             (eq? 'b (array-ref a -2)))))
 
   (pass-if-exception "negative length" exception:length-non-negative
-     (with-input-from-string "'#1:-3(#t #t)" read)))
+     (with-input-from-string "'#1:-3(#t #t)" read))
 
+  (pass-if "bitvector is self-evaluating"
+     (equal? (compile (bitvector)) (bitvector))))
 
 ;;;
 ;;; equal? with vector and one-dimensional array