[9] RFR of 8073207: javadoc typos in java.nio.channels.Pipe

[Brian Burkhalter]

Please review at your convenience:

Issue:	https://bugs.openjdk.java.net/browse/JDK-8073207
Patch:	http://cr.openjdk.java.net/~bpb/8073207/webrev.00/

Simply implements what the description suggests.

Thanks,

Brian