cmake: Build platedetector filter
cmake: Build platedetector filter

Change-Id: I33f32addca1e75733914d7908f64bb4a51a7b9d2

shelsonjava/kms-filters,Kurento/kms-filters,shelsonjava/kms-filters,Kurento/kms-filters,TribeMedia/kms-filters,Kurento/kms-filters,shelsonjava/kms-filters,TribeMedia/kms-filters,TribeMedia/kms-filters