[jdk11u-dev] RFR: 8333839: [11u] LingeredAppTest.java fails Can't find source file: LingeredApp.java

[SendaoYan]

Hi all,
  The testcase `test/lib-test/jdk/test/lib/apps/LingeredAppTest.java` fails as `Parse Exception: Can't find source file: LingeredApp.java`. This PR fix the testcase bug, the change has been verified, no risk.
Thanks.

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Commit messages:
 - 8333839: [11u] LingeredAppTest.java fails Can't find source file: LingeredApp.java

Changes: https://git.openjdk.org/jdk11u-dev/pull/2752/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2752&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333839
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2752.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2752/head:pull/2752

PR: https://git.openjdk.org/jdk11u-dev/pull/2752