In the compile flags, set the minimum supported CPU architecture to Power8 on AIX, because we do not want to support pwr7 architecture any more.
------------- Commit messages: - accidentially changed mode bits - JDK-8307520 Changes: https://git.openjdk.org/jdk/pull/13933/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13933&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8307520 Stats: 4 lines in 2 files changed: 3 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/13933.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13933/head:pull/13933 PR: https://git.openjdk.org/jdk/pull/13933
