add #include <unistd.h> to classes which use ::getpid

I got  "error: ‘::getpid’ has not been declared" and solved it with
adding #include <unistd.h>

Updated version of change 23032.
Now including <sys/types.h> as well.

Change-Id: I969845e1c4d5b72a223f6f4e0050b2fb342b8f17
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/plugins/pulseaudio/qaudioinput_pulse.cpp

@@ -47,6 +47,8 @@
 #include "qaudiodeviceinfo_pulse.h"
 #include "qpulseaudioengine.h"
 #include "qpulsehelpers.h"
+#include <sys/types.h>
+#include <unistd.h>
 
 QT_BEGIN_NAMESPACE
 

src/plugins/pulseaudio/qaudiooutput_pulse.cpp

@@ -47,6 +47,8 @@
 #include "qaudiodeviceinfo_pulse.h"
 #include "qpulseaudioengine.h"
 #include "qpulsehelpers.h"
+#include <sys/types.h>
+#include <unistd.h>
 
 QT_BEGIN_NAMESPACE
 

src/plugins/pulseaudio/qpulseaudioengine.cpp

@@ -46,6 +46,8 @@
 #include "qaudiodeviceinfo_pulse.h"
 #include "qaudiooutput_pulse.h"
 #include "qpulsehelpers.h"
+#include <sys/types.h>
+#include <unistd.h>
 
 QT_BEGIN_NAMESPACE