package/freeswitch: select OpenCV modules needed for mod_cv
Fixes
http://autobuild.buildroot.net/results/ffd/
ffd572d7bb68d8ed46ce76b2af824503c587449f/
http://autobuild.buildroot.net/results/e53/
e53e356451aa4541a76e26722fd71051896e774b/
http://autobuild.buildroot.net/results/564/
5649ff1b50a1eaafbd0e1a329bff87a65ce18da0/
http://autobuild.buildroot.net/results/c60/
c60f97c6aafb1a94cb4ce344953598eae8b4a912/
http://autobuild.buildroot.net/results/c1a/
c1ac61f9a77635962babdb6bfb31dbecb7f4d439/
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>