Compile private Qt APIs autotests for INTEGRITY

- getgrgid/getpwuid are not supported
- the default constructor of "ObserverOrUninit" must be referenced for GHS compiler

Task-number: QTBUG-96176
Pick-to: 6.2
Change-Id: I24093da76e116aba4b87a8f5c5763b03d082a2cd
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

tests/auto/corelib/io/qfileinfo/tst_qfileinfo.cpp

@@ -2063,7 +2063,7 @@ bool IsUserAdmin()
 void tst_QFileInfo::owner()
 {
     QString userName;
-#if defined(Q_OS_UNIX) && !defined(Q_OS_VXWORKS)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_VXWORKS) && !defined(Q_OS_INTEGRITY)
     {
         passwd *user = getpwuid(geteuid());
         QVERIFY(user);
@@ -2125,7 +2125,7 @@ void tst_QFileInfo::owner()
 void tst_QFileInfo::group()
 {
     QString expected;
-#if defined(Q_OS_UNIX) && !defined(Q_OS_VXWORKS)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_VXWORKS) && !defined(Q_OS_INTEGRITY)
     struct group *gr;
     gid_t gid = getegid();
 

tests/auto/corelib/kernel/qproperty/tst_qproperty.cpp

@@ -1454,6 +1454,7 @@ void tst_QProperty::modifyObserverListWhileIterating()
             DestructingObserver observer = {};
             char* memory;
             ~ObserverOrUninit() {}
+            ObserverOrUninit() {}
         };
     {
         // observer deletes itself while running the notification