re PR fastjar/9532 (jar -C flag is incompatible with Sun's (fastjar uses nonportable feature of getcwd))

	PR java/9532
	* jartool.c (add_to_jar): Return 1 on failure to open file.
	Split out -C case to:
	* jartool.c (add_to_jar_with_dir): New function.

From-SVN: r68847