Fix some binding-testsuite.el test cases when threads are used.

Fix some binding-testsuite.el test cases when threads are used.

This one still fails:

(defvar binding-test-some-local 'some)

(defvar binding-test-buffer-A (get-buffer-create "A"))

(with-current-buffer binding-test-buffer-A
 (set (make-variable-buffer-local 'binding-test-some-local) 'local))

(run-in-thread '(with-current-buffer binding-test-buffer-A
                 (message "local: %s" binding-test-some-local)))
(while (yield))