Add ${ARGN} to add_cfe_coverage_test in arch_build.cmake

[asgibson]

Is your feature request related to a problem? Please describe.
Trying to build CF unit tests with additional libraries through add_cfe_coverage_test does not work because ARGN is not added in the target_link_libraries call.

Describe the solution you'd like
Add ${ARGN} into target_link_libraries call in add_cfe_coverage_test so that additional libraries can be given where necessary.

Describe alternatives you've considered
Writing my own coverage test addition for my use case, but just adding the ${ARGN} in add_cfe_coverage_test works, so why re-invent?

Additional context
The addition should be transparent to any other calls currently in use; it is opt in only. ARGN should be empty in current use cases (it could not be, but that is unlikely).

Requester Info
Alan Gibson NASA/GSFC 587

[jphickey]

The ${ARGN} convention is that it is basically an extension of the last argument - that is, a variably-sized list of extra arguments that are the same type/intent as the last argument. In this context, it means that it would be specifying multiple source files for the test (aka the existing UT_SRCS arg).

I think it was just an oversight/mistake that ${ARGN} was not included in the add_library. This can be fixed.

However, that being said, its is for source files, not libraries.

Suggestion is to use add_cfe_coverage_dependency if you need to add extra link libraries.