RFR: JDK-8219487: j.l.c.ClassDesc spec should contain precise assertions for one parameter's methods

[Vicente Romero]

Please review the simple fix, javadoc editing, for [1] at [2]. The patch 
is just changing "_any_ argument" for "_the_ argument" for some methods 
of java.lang.constant.ClassDesc receiving only one argument.

Thanks,
Vicente

[1] https://bugs.openjdk.java.net/browse/JDK-8219487
[2] http://cr.openjdk.java.net/~vromero/8219487/webrev.00/