Backport time tracking fix from NewOS:

thread code now properly traces time spent in user vs kernel mode. The code was
just plain broken before
http://www.newos.org/cgi-bin/perfbrowse.perl?@describe+1704


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2599 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/thread_types.h

@@ -44,6 +44,10 @@ enum team_state {
 	TEAM_STATE_DEATH	// being killed
 };
 
+enum {
+	KERNEL_TIME,
+	USER_TIME
+};
 
 #define THREAD_RETURN_EXIT			0x1
 #define THREAD_RETURN_INTERRUPTED	0x2
@@ -129,7 +133,8 @@ struct thread {
 	bigtime_t		user_time;
 	bigtime_t		kernel_time;
 	bigtime_t		last_time;
-
+	int				last_time_type;	// KERNEL_TIME or USER_TIME
+	
 	// architecture dependant section
 	struct arch_thread arch_info;
 };