package/libyuv: bump to version 413a8d8041f1cc5a350a47c0d81cc721e64f9fd0

- Switch to https://chromium.googlesource.com/libyuv/libyuv

 which is
  the official repository and still active (updated this month).
  Current site has not been updated since 2015.
- Drop second patch (already in version)
- Add hash for license file

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>