hg: jdk/jdk: 8240242: improve the javadoc for Lookup::dropLookupModes w.r.t. dropping UNCONDITIONAL

[mandy.chung at oracle.com]

Changeset: e287fc5b9e86
Author:    mchung
Date:      2020-03-12 11:56 -0700
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/e287fc5b9e86

8240242: improve the javadoc for Lookup::dropLookupModes w.r.t. dropping UNCONDITIONAL
Reviewed-by: chegar, rriggs

! src/java.base/share/classes/java/lang/invoke/MethodHandles.java