Fix QT_POSIX_IPC support

On platforms which does not have at all sysv support, all
posix ipc tests and compilation failed because sysv
specific header files were included unconditionally.

Change-Id: I5713ace6daeb6e79f8794ce42b2b3dfa1b95ab2d
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>

config.tests/unix/ipc_posix/ipc.cpp

@@ -32,7 +32,6 @@
 ****************************************************************************/
 
 #include <sys/types.h>
-#include <sys/ipc.h>
 #include <sys/mman.h>
 #include <semaphore.h>
 #include <fcntl.h>

src/corelib/kernel/qsharedmemory_posix.cpp

@@ -46,7 +46,6 @@
 
 #ifndef QT_NO_SHAREDMEMORY
 #include <sys/types.h>
-#include <sys/ipc.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>

src/corelib/kernel/qsharedmemory_unix.cpp

@@ -42,8 +42,8 @@
 
 #ifndef QT_NO_SHAREDMEMORY
 #include <sys/types.h>
-#include <sys/ipc.h>
 #ifndef QT_POSIX_IPC
+#include <sys/ipc.h>
 #include <sys/shm.h>
 #else
 #include <sys/mman.h>

src/corelib/kernel/qsystemsemaphore_posix.cpp

@@ -45,8 +45,6 @@
 #ifndef QT_NO_SYSTEMSEMAPHORE
 
 #include <sys/types.h>
-#include <sys/ipc.h>
-#include <sys/sem.h>
 #include <fcntl.h>
 #include <errno.h>
 

src/corelib/kernel/qsystemsemaphore_unix.cpp

@@ -40,8 +40,8 @@
 #ifndef QT_NO_SYSTEMSEMAPHORE
 
 #include <sys/types.h>
-#include <sys/ipc.h>
 #ifndef QT_POSIX_IPC
+#include <sys/ipc.h>
 #include <sys/sem.h>
 #endif
 #include <fcntl.h>

tests/auto/corelib/kernel/qsharedmemory/test/tst_qsharedmemory.cpp

@@ -173,8 +173,8 @@ void tst_QSharedMemory::cleanup()
 #ifndef Q_OS_WIN
 #include <private/qsharedmemory_p.h>
 #include <sys/types.h>
-#include <sys/ipc.h>
 #ifndef QT_POSIX_IPC
+#include <sys/ipc.h>
 #include <sys/shm.h>
 #else
 #include <sys/mman.h>