RFR 9: 8071480: ProcessBuilder.start spec linked to the wrong checkRead and checkWrite methods

[Roger Riggs]

Please review two javadoc updates to java.lang.ProcessBuilder.

Webrev:
   http://cr.openjdk.java.net/~rriggs/webrev-typo-8073220/

Issues:
   8071480: (process spec) ProcessBuilder.start spec linked to the wrong 
checkRead and checkWrite methods
   8073220: A typo in the documentation for class ProcessBuilder

Thanks, Roger