opencv: Update bbappend to follow meta-oe upgrade

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/dynamic-layers/openembedded-layer/recipes-support/opencv/opencv_3.3.bbappend b/dynamic-layers/openembedded-layer/recipes-support/opencv/opencv_3.4.%.bbappend
similarity index 100%
rename from dynamic-layers/openembedded-layer/recipes-support/opencv/opencv_3.3.bbappend
rename to dynamic-layers/openembedded-layer/recipes-support/opencv/opencv_3.4.%.bbappend