partprobe: Detect/report any error when writing to stdout.

partprobe: Detect/report any error when writing to stdout.
	* partprobe/Makefile.am (partprobe_LDADD): Add lib/libparted.la.
	* partprobe/partprobe.c:
	Include "closeout.h" for close_stdout.
	Include "version-etc.h" for version_etc prototype.
	Declare global, program_name.
	(PROGRAM_NAME, AUTHORS): Define.
	(help): Use PROGRAM_NAME, rather than hard-coding it.
	(version): Use gnulib's version_etc.
	(main): Set program_name.
	Use atexit to close stdout carefully upon exit.