parallel-tests: "recheck" behaves better in case of compilation failures

parallel-tests: "recheck" behaves better in case of compilation failures

With this change, the "recheck" target behaves better in the face of build
failures related to previously failed tests.  For example, if a test is a
compiled program that must be rerun by "make recheck", and its compilation
fails, that test will still be rerun by further "make recheck" invocations.
Previously, its '.log' and '.trs' would have both been lost, so that the
test would have not been re-run.

This change fixes automake bug#11791.

* NEWS: Update.
* lib/am/check.am (recheck, check-TESTS): Adjust to cater to scenario
described above.
* t/parallel-tests-recheck-pr11791.sh: New test.
* t/list-of-tests.mk: Add it.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>