testsuite: libtestsuite depends on individual components
testsuite: libtestsuite depends on individual components

Ensure this dependency is explicit in the Makefile so rebuilding just
one test works correctly. Also reduce some repetition in the test LDADD
bits by adding a new TESTSUITE_LDADD variable.

lucasdemarchi/kmod,Distrotech/kmod,lucasdemarchi/kmod,lpereira/kmod,pmmccorm/kmod,lpereira/kmod,pmmccorm/kmod,lucasdemarchi/kmod,Distrotech/kmod,pmmccorm/kmod,Distrotech/kmod,lpereira/kmod