Allow building OpenJDK with UBSan. Currently the build fails when optimizing the image due to lots of undefined behavior (it invokes the built JVM). Follow up PRs will either replace the undefined behavior with well defined behavior or suppress errors which are intentional. The goal is to make OpenJDK more well defined and thus more portable across compilers and architectures.
------------- Commit messages: - Remove leftover debugging logic - Initial implementation of UBSan Changes: https://git.openjdk.org/jdk/pull/11604/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11604&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8298448 Stats: 54 lines in 4 files changed: 54 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/11604.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11604/head:pull/11604 PR: https://git.openjdk.org/jdk/pull/11604
