kernel/OS.h: Include sys/types.h instead of pthread.h.

This avoids polluting the namespace significantly. Also adjust
all files which depended on this behavior to include pthread.h
directly.

headers/os/kernel/OS.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2009, Haiku Inc. All Rights Reserved.
+ * Copyright 2004-2019, Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef _OS_H
@@ -7,7 +7,7 @@
 
 /** Kernel specific structures and functions */
 
-#include <pthread.h>
+#include <sys/types.h>
 #include <stdarg.h>
 
 #include <SupportDefs.h>

src/apps/haikudepot/server/ServerSettings.cpp

@@ -7,6 +7,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <pthread.h>
 
 #include <AppFileInfo.h>
 #include <Application.h>

src/apps/mail/QueryList.cpp

@@ -6,6 +6,8 @@
 
 #include "QueryList.h"
 
+#include <pthread.h>
+
 #include <Autolock.h>
 #include <Debug.h>
 #include <NodeMonitor.h>

src/kits/interface/ColorConversion.cpp

@@ -21,6 +21,7 @@
 
 #include <new>
 #include <string.h>
+#include <pthread.h>
 
 
 using std::nothrow;

src/kits/interface/Font.cpp

@@ -30,6 +30,8 @@
 #include <new>
 #include <stdio.h>
 #include <stdlib.h>
+#include <pthread.h>
+
 
 using namespace std;
 

src/kits/storage/disk_device/DiskSystemAddOnManager.cpp

@@ -11,6 +11,7 @@
 #include <string>
 
 #include <stdio.h>
+#include <pthread.h>
 
 #include <Directory.h>
 #include <Entry.h>

src/system/libroot/posix/semaphore.cpp

@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#include <pthread.h>
 
 #include <OS.h>
 

src/system/libroot/posix/sys/mman.cpp

@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <string.h>
+#include <pthread.h>
 
 #include <OS.h>
 

src/system/libroot/posix/sys/xsi_msg_queue.cpp

@@ -12,6 +12,7 @@
 #include <fcntl.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#include <pthread.h>
 
 #include <OS.h>