Use tar.bz2 instead of git.
Also added the hash file.
Changes: 0080aca235/CHANGELOG
[Thomas: remove unnecessary LIBVPX_VERSION_MAJOR, as suggested by
Arnout.]
Signed-off-by: Sagaert Johan <sagaert.johan@proximus.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
