Support bool-vectors in cl-extra.el

* lisp/emacs-lisp/cl-extra.el (cl-coerce): Support bool-vector.

Copyright-paperwork-exempt: yes

lisp/emacs-lisp/cl-extra.el

@@ -48,6 +48,8 @@ TYPE is a Common Lisp type specifier.
 \n(fn OBJECT TYPE)"
   (cond ((eq type 'list) (if (listp x) x (append x nil)))
 	((eq type 'vector) (if (vectorp x) x (vconcat x)))
+	((eq type 'bool-vector)
+         (if (bool-vector-p x) x (apply #'bool-vector (cl-coerce x 'list))))
 	((eq type 'string) (if (stringp x) x (concat x)))
 	((eq type 'array) (if (arrayp x) x (vconcat x)))
 	((and (eq type 'character) (stringp x) (= (length x) 1)) (aref x 0))