soundcloud.lua: support HTTPS
soundcloud.lua: support HTTPS

The website uses HTTPS by default so that was confusing

(cherry picked from commit 28b8fd48c6f86b56b09f8eb600d7e26fe0bf714f)
Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2