tests: display the output of failed make check runs

tests: display the output of failed make check runs

After a make check fails, it shows a summary but not the output of the
failed tests although they contain information to diagnose the problem.

Set the VERBOSE=true automake variable which is documented to collect
and display the failed script output at the end of a run (the content of
the test-suite.log file (valid from automake-1.11 up).

http://www.gnu.org/software/automake/manual/automake.html#index-VERBOSE

Also remove the run-make-check.sh that did the same in a way that is not
compatible with automake-1.11.

Signed-off-by: Loic Dachary <ldachary@redhat.com>