package/vlc: security bump to version 2.2.8

package/vlc: security bump to version 2.2.8

Version 2.2.7 fixes CVE-2017-10699
http://git.videolan.org/?p=vlc/vlc-2.2.git;a=commitdiff;h=0de56d69ff06afceb5b16721ea5965a676b938b9

Removed patches applied upstream:
0013-codec-avcodec-check-avcodec-visible-sizes.patch
http://git.videolan.org/?p=vlc/vlc-2.2.git;a=commitdiff;h=6cc73bcad19da2cd2e95671173f2e0d203a57e9b

0014-decoder-check-visible-size-when-creating-buffer.patch
http://git.videolan.org/?p=vlc/vlc-2.2.git;a=commitdiff;h=a38a85db58c569cc592d9380cc07096757ef3d49

Added all hashes provided by upstream, added license hashes.

Switched _SITE to https.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>