Revert "Disable hyperv"

This reverts commit 632bcdbbcc124687584a697f648e41e6e14f801a.
chmod +x is not required when running make install
SUBDIR -> TESTS_SUBDIRS
Make tests into TESTS_SUBDIRS, create the Kyuafile, and just use bsd.test.mk, not bsd.subdir.mk and bsd.obj.mk
Not needed anymore
Automatically generate the Kyuafile
atf.test.mk -> bsd.test.mk
atf.test.mk -> bsd.test.mk