Added note to doc/testing and doc/building about the appropriate make target to regenerate them.
------------- Commit messages: - How to edit doc/testing, doc/building Changes: https://git.openjdk.org/jdk/pull/10115/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10115&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8293202 Stats: 18 lines in 4 files changed: 18 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/10115.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10115/head:pull/10115 PR: https://git.openjdk.org/jdk/pull/10115
