Update the build documentation to reflect the fact that non-English locales are only supported on a "best effort" principle, and add instructions how to install the necessary language pack to Visual Studio.
------------- Commit messages: - 8264425: Update building.md on non-English locales on Windows Changes: https://git.openjdk.org/jdk/pull/16694/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16694&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8264425 Stats: 78 lines in 2 files changed: 78 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/16694.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16694/head:pull/16694 PR: https://git.openjdk.org/jdk/pull/16694
