hg: amber/amber: Expose adapter methods for adapting calls between bootstream method

[paul.sandoz at oracle.com]

Changeset: 8bb5ff495383
Author:    psandoz
Date:      2018-02-20 17:56 -0800
URL:       http://hg.openjdk.java.net/amber/amber/rev/8bb5ff495383

Expose adapter methods for adapting calls between bootstream method
handles accepting a sequence of arguments and a bootstrap call
descriptor or vice-versa.

! src/java.base/share/classes/java/lang/invoke/BootstrapCallInfo.java
! src/java.base/share/classes/java/lang/invoke/BootstrapMethodInvoker.java