RFR: JDK-8256950: Add record attribute support to symbol generator CreateSymbols [v4]

[Chris Hegarty]

On Tue, 1 Dec 2020 11:18:11 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> Adding support for record classes in the historical data for ct.sym. This includes a few changes not strictly needed for the change:
>> -updating and moving tests into test/langtools, so that it is easier to run them.
>> -fixing Record attribute reading in javac's ClassReader (used for tests, but seems like the proper thing to do anyway).
>> -fixing the -Xprint annotation processor to print record component annotations.
>> 
>> Changes to jdk.jdeps' classfile library are needed so that the ct.sym creation works.
>
> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Reflecting review comments.

Marked as reviewed by chegar (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1480