RFR: JDK-8029117: (reflect) clarify javadoc for getMethod(...) and getMethods()

[Joel Borggrén-Franck]

Hi

Please review this javadoc fix for Class.getMethod(name, params) and Class.getMethods() when called on an interface.

This fix aligns the javadoc with the long standing implementation to not return any implicitly declared object methods when calling getMethod(s) on an interface.

Bug: https://bugs.openjdk.java.net/browse/JDK-8029117
Webrev: http://cr.openjdk.java.net/~jfranck/8029117/webrev.01/

cheers
/Joel