RFR: 8257799: Update JLS cross-references in java.compiler [v2]

[Joe Darcy]

> A few of the @jls tags in the java.compiler module don't make the corresponding JLS section anymore; the null literal section and constant expression sections were renumbered.
> 
> This change makes corrects the mismatches.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright year.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1642/files
  - new: https://git.openjdk.java.net/jdk/pull/1642/files/6490dcb9..35a7fb6f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1642&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1642&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1642.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1642/head:pull/1642

PR: https://git.openjdk.java.net/jdk/pull/1642