RFR: JDK-8278318: Create {@index} entries for key LangTools terms

Tue Dec 7 00:33:21 UTC 2021

On Tue, 7 Dec 2021 00:19:45 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Please review a small update to the `jdk.compiler` and `java.compiler` module declarations, to index the names of some key compiler-related APIs.
> 
> There are no API changes, so no CSR is required.

Please update copyright years before pushing.

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Marked as reviewed by darcy (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6729