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 <jb@videolan.org>

share/lua/playlist/soundcloud.lua

@@ -22,7 +22,7 @@
 
 -- Probe function.
 function probe()
-    return vlc.access == "http"
+    return ( vlc.access == "http" or vlc.access == "https" )
         and string.match( vlc.path, "soundcloud%.com/.+/.+" )
 end