dependency on third-party library libyuv seems unused in build #60
Description
There are tests that depend on libyuv and CMake configuration exist for those tests, but they don't seem to get built currently. So libyuv gets built when third-party dependency build script runs but does not get used while building Ocean.
For example, testcv library build configuration does not have a "add_subdirectory" directive for the subdirectory "testlibyuv".
Removing references to libyuv from "build/cmake/third-party/" directory then performing clean rebuild resulted in successful build on my Mac.
Not sure if there are Gradle, Visual Studio, or Xcode projects that depend on libyuv, but I haven't run into one yet.
A related issue is that searching for "OCEAN_TEST_CV_LIBYUV_HAS_EXTRAS" shows that the preprocessor macro is specified in CMake configuration for "testsynthesis", "testopencv", and "testsegmentation". But, the only source code that use "OCEAN_TEST_CV_LIBYUV_HAS_EXTRAS" is in "testlibyuv".