jar -i

[Xueming Shen]

Martin,

Another cleanup. The jar manual [1] clearly indicates the options 
"cuxti" are exclusive with each
other. The check code was missed when the "i" was added in.

http://cr.openjdk.java.net/~sherman/4690407/webrev

Please help review.

#Issue of "-i0" mentioned in the description (tracked in a separate 
CR#4823701) is no longer reproducible.

Thanks,
Sherman

[1]http://java.sun.com/javase/6/docs/technotes/tools/solaris/jar.html