Fixed type defintion for os_thread_id_t on 64 bit Windows.

It used to be declared as ulint, which is 32/64 bit integer depending on OS bitness.
However this declaration lead to problems with os_compare_and_swap_thread_id 
implementation which operated on 32 bit integers (InterlockedCompareExchange)

Using 64 bit int   lead to  wrong result in os_compare_and_swap_thread_id 
and to crash/assertion in  rw_lock_set_writer_id_and_recursion_flag()

The fix is to use 4 byte integer to os_thread_id type definition.

storage/innodb_plugin/include/os0thread.h

@@ -44,7 +44,7 @@ can wait inside InnoDB */
 
 #ifdef __WIN__
 typedef void*			os_thread_t;
-typedef ulint			os_thread_id_t;	/*!< In Windows the thread id
+typedef unsigned long	os_thread_id_t;	/*!< In Windows the thread id
 						is an unsigned long int */
 #else
 typedef pthread_t		os_thread_t;