Qt: Fix unit test by adding initial.test dep
* lang/qt/tests/t-keylist.cpp: Verify that GNUPGHOME is set. * lang/qt/tests/initial.test: New dummy test. * lang/qt/tests/Makefile.am: Add dependency to initial.test
Feels weird but this follows the pattern in tests/gpg/Makefile.am
and solves the problem that the environment is dirty.