Modified from patch by Julian Hall <jules@acris.co.uk>:

	* jartool.c (errno): Conditionally declare.
	(O_BINARY): Conditionally define.
	(main): Use open, not creat.  Use O_BINARY everywhere.
	(make_manifest): Use O_BINARY.
	(add_to_jar): Likewise.

From-SVN: r43766