MB-7849:  clean-all will remove all ctypes* dirs

The ctypes-1.1.0 tarball in grommit now has correct directory structure,
with top level dir "ctypes" and not "ctypes-1.1.0".

Change-Id: I78c10b0ea95261c3ceb39a114ff8fb545d1c8f64
Reviewed-on: http://review.couchbase.org/26350
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>