psxfile01: Fix one second sleep

Checking of atime in psxfile01 (line 713) can fail since a delay for
rtems_clock_get_ticks_per_second (line 699) gives a delay of less than
one second, depending on when the last tick occurred. atime is measured
in whole seconds, and a fast processor might read the file before a new
second occurs. Add one tick to the delay will solve the problem.

testsuites/psxtests/psxfile01/test.c

@@ -696,7 +696,7 @@ since new path is not valid");
   ctime2 = buf.st_ctime;
 
 
-  status = rtems_task_wake_after( rtems_clock_get_ticks_per_second() );
+  status = rtems_task_wake_after( rtems_clock_get_ticks_per_second() + 1);
   rewind( file );
   while ( fgets(buffer, 128, file) )
     printf( "%s", buffer );