ar_track_alvar 0.5.x only support opencv2, whereas meta-oe provides
opencv3. The ar_track_alvar kinectic versions 0.6.x also support
opencv3, as pointed out in the comment of commit e82747c4 [1].
Therefore, this commit updates ar-track-alvar to version 0.6.1
to resolve#397.
[1] e82747c42d.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>
Lukas Bulwahn