Synchronize `make/RunTests.gmk` keyword variables with `doc/testing.{md,html}`.
------------- Commit messages: - Synchronize `make/RunTests.gmk` keyword variables with `doc/testing.{md,html}` Changes: https://git.openjdk.org/jdk/pull/26789/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26789&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8365244 Stats: 32 lines in 2 files changed: 25 ins; 2 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/26789.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/26789/head:pull/26789 PR: https://git.openjdk.org/jdk/pull/26789