test: sync list-of-tests.

* t/list-of-tests.mk (handwritten_TESTS): add back t/instdir-ltlib.sh;
turns out all tests need to be listed there, XFAIL_TESTS is not
included, and that seems ok.
* t/CheckListOfTests.am (maintainer-check-list-of-tests): only
delete temp files if result is successful.
2 files changed