qt: Fix build against Qt 5.9
* lang/qt/tests/t-keylist.cpp (KeyListTest::testListAllKeysSync): Ensure same type for both arguments of QCOMPARE. * lang/qt/tests/t-various.cpp (TestVarious::testSetExpire): Ensure same type for both arguments of QCOMPARE.
Qt 5.9 does not yet have the generic qCompare helper which supports
arguments of any type that can be compared with ==.
- GnuPG-bug-id: T5592