Testlib: fix the last few s/Q_OS_MAC/Q_OS_DARWIN/w

Change-Id: I6fe6a865aea37c6a2d153bd2c3aace5242362c88
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>

src/testlib/qtestcase.cpp

@@ -707,7 +707,7 @@ Q_TESTLIB_EXPORT void qtest_qParseArgs(int argc, const char *const argv[], bool
     QTest::testFunctions.clear();
     QTest::testTags.clear();
 
-#if defined(Q_OS_MAC) && defined(HAVE_XCTEST)
+#if defined(Q_OS_DARWIN) && defined(HAVE_XCTEST)
     if (QXcodeTestLogger::canLogTestProgress())
         logFormat = QTestLog::XCTest;
 #endif

tests/auto/testlib/selftests/findtestdata/findtestdata.cpp

@@ -26,7 +26,7 @@ void FindTestData::initTestCase()
     // verify that our qt.conf is working as expected.
     QString app_path = QCoreApplication::applicationDirPath();
     QString install_path = app_path
-#ifdef Q_OS_MAC
+#ifdef Q_OS_DARWIN
         + "/Contents"
 #endif
         + "/tests";
@@ -75,7 +75,7 @@ void FindTestData::paths()
 
     // 2. at the test install path (faked via qt.conf)
     QString testfile_path2 = app_path
-#ifdef Q_OS_MAC
+#ifdef Q_OS_DARWIN
         + "/Contents"
 #endif
         + "/tests/findtestdata/" TESTFILE;