This is suboptimal: the current high-level definitions of test programs
in the Makefiles do not carry enough information to support all the
features of Kyuafiles. For example, it is not possible to register test
programs that do *not* use the ATF libraries, which is something that
has been frequently requested around here; nor it is possible to attach
arbitrary metadata to test programs from the Makefile, which is handy
particularly for ATF-less test programs.
For these reasons, consider this a transitional step.
Note that, with this change, you should now be able to use the 'kyua'
tool to run the tests in /usr/tests.
704facb580