sysdep.c (__gnat_get_task_options): Refine the workaround for the VX_USR_TASK_OPTION bug in VxWorks 7...

2015-10-26  Jerome Lambourg  <lambourg@adacore.com>

	* sysdep.c (__gnat_get_task_options): Refine the workaround for
	the VX_USR_TASK_OPTION bug in VxWorks 7, as we cannot check the
	value of VX_DEALLOC_TCB in RTP mode, the macro value not being
	defined in the headers.
	* g-arrspl.ads: Fix typo.

From-SVN: r229356