RFR: JDK-8296913: Correct enable preview idiom in JdbLastErrorTest.java [v3]

[Joe Darcy]

> Update the compile command in JdbLastErrorTest.java so that it doesn't need to be modified with each new JDK release to keep using preview features.

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

  Update.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11139/files
  - new: https://git.openjdk.org/jdk/pull/11139/files/0e7972b8..7a8d00b4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11139&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11139&range=01-02

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11139.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11139/head:pull/11139

PR: https://git.openjdk.org/jdk/pull/11139