[Cmake] CMake tests

[Amitha Perera]

In fixing the dependency analysis bug, I added some more tests. In
particular, the Dependency test now contains four executables. I've
added four tests, each one of which runs a single executable. However,
I notice that the build process builds all four each time. Since the
only time these tests will fail is at link time, the net effect is
that the same set of tests are being run four times. Is there a better
way to specify the tests?

Thanks,
Amitha.