git: openjdk/jdk21: 8310861: Improve location reporting for javac serial lint warnings

[Joe Darcy]

Changeset: 71a41f7e
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2023-06-26 22:35:37 +0000
URL:       https://git.openjdk.org/jdk21/commit/71a41f7e7193fdca01601847e60d7fd92120e3b6

8310861: Improve location reporting for javac serial lint warnings
8310907: Add missing file

Reviewed-by: jlahoda
Backport-of: 289f218a32558bbbf7e6c589b4618757bd6d043f

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java
! test/langtools/tools/javac/warnings/Serial/CtorAccess.java
! test/langtools/tools/javac/warnings/Serial/CtorAccess.out
! test/langtools/tools/javac/warnings/Serial/EnumSerial.java
! test/langtools/tools/javac/warnings/Serial/EnumSerial.out
! test/langtools/tools/javac/warnings/Serial/Extern.java
! test/langtools/tools/javac/warnings/Serial/Extern.out
! test/langtools/tools/javac/warnings/Serial/RecordSerial.java
! test/langtools/tools/javac/warnings/Serial/RecordSerial.out
= test/langtools/tools/javac/warnings/Serial/empty.out