* 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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@43766 138bc75d-0d04-0410-961f-82ee72b054a4