Fix the patch-bzip2 target.

The main site URI scheme is now https. Update the URL in some other
places while we're here.

Change-Id: Ib03d4fd1c58dabd3cf5050dc4f79216e0b94d525
Reviewed-on: https://code.wireshark.org/review/4133
Reviewed-by: Gerald Combs <gerald@wireshark.org>