qtextlayout autotest has ifdef's with inverted logic

qtbase/tests/auto/gui/text/qtextlayout/tst_qtextlayout.cpp has two blocks of code as follows:

#if !defined(Q_WS_MAC)
    QSKIP("This test can not be run on Mac");
#endif

The logic here is erroneously inverted, i.e. the QSKIP is called on all platforms except for Mac (actually, Q_WS_MAC is never defined any more – should now be Q_OS_MAC). If I correct the logic by removing the "!", one of the test functions fails on Linux, suggesting that either the test is incorrect or the code under test is incorrect.

The QSKIP's were added by commits 37f20ea8 and 9f837af9 in May 2011, but it appears that the CI gate has not been running tests on Mac since the qtbase refactor was merged.