Fixes the issue by adding `--add-exports` for the required modules and making the `HttpHeaderParser` final (fixing an issue with calling overridable methods in a constructor).
------------- Commit messages: - Fix make build-test-lib Changes: https://git.openjdk.org/jdk/pull/13885/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13885&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8307732 Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/13885.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13885/head:pull/13885 PR: https://git.openjdk.org/jdk/pull/13885
