vxworks.h (PTRDIFF_TYPE, SIZE_TYPE): Restore unconditional basic definitions.

vxworks.h (PTRDIFF_TYPE, SIZE_TYPE): Restore unconditional basic definitions.

2017-07-04  Olivier Hainque  <hainque@adacore.com>

	* config/vxworks.h (PTRDIFF_TYPE, SIZE_TYPE): Restore
	unconditional basic definitions.
	(VXWORKS_LIBS_RTP): Likewise, prefixed by VXWORKS_SYSCALL_LIBS_RTP,
	empty by default.
	* config/i386/vxworks.h (PTRDIFF_TYPE, SIZE_TYPE): Redefine,
	accounting for 64bit ABIs using cpu specific macros available for
	this purpose.
	(VXWORKS_SYSCALL_LIBS_RTP): Likewise.

From-SVN: r249950