Implementation of [JEP draft: Compile the JDK as C++17](https://bugs.openjdk.org/browse/JDK-8310260)
------------- Commit messages: - vm_version_linux_riscv.cpp - allocation.cpp - 8310260 Changes: https://git.openjdk.org/jdk/pull/14988/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14988&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8314488 Stats: 5 lines in 3 files changed: 0 ins; 0 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/14988.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14988/head:pull/14988 PR: https://git.openjdk.org/jdk/pull/14988
