hg: jigsaw/jake/jdk: Add missing @spec tag for JPMS PR

[mark . reinhold]

Changeset: c3257e8a44df
Author:    mr
Date:      2017-03-07 07:37 -0800
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/c3257e8a44df

Add missing @spec tag for JPMS PR

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