Fix problem with files like "~" in `directory-files-recursively'

* lisp/files.el (directory-files-recursively): Don't bug out on
files like "~" that have special meaning to `expand-file-name'
(bug#36490).
1 job for master in 59 minutes and 26 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #2484
test-all

00:59:26