gst1-plugins-bad: select all opencv modules needed

gstopencv.c includes the old-style header opencv/cv.h which includes a
set of module's headers. To satisfy the opencv/cv.h requirements we need
to select the modules which provide the required headers.

Fixes:
   http://autobuild.buildroot.net/results/f5b/f5b248eb7be38d6eb3655cdc1ab6ee5e716b9b29/



Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: Samuel Martin <smartin@aldebaran-robotics.com>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>