RFR: 8294310: compare.sh fails on macos after JDK-8293550

[Erik Joelsson]

Since [JDK-8293550](https://bugs.openjdk.org/browse/JDK-8293550) we are adding adhoc signatures to all binaries on macos, and the compare script is no longer running cleanly. In order to compare binaries on macos, especially on aarch64, where signatures are mandatory, we will have to remove them first. They will never be exactly the same between two runs.

This patch adds `codesign --remove-signature` to compare.sh before comparing any executables or libraries. Stripping the signature has to happen after running `strip` as strip will fail otherwise. I also had to add a special option to strip to avoid warnings.

While enabling baseline compare runs for macosx-aarch64 in our CI, I discovered that were also not running testmake for aarch64, so I snuck in that change in jib-profiles.js here as well.

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Commit messages:
 - add testmake profile for macosx-aarch64
 - JDK-8294310

Changes: https://git.openjdk.org/jdk/pull/10435/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10435&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294310
  Stats: 14 lines in 3 files changed: 10 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/10435.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10435/head:pull/10435

PR: https://git.openjdk.org/jdk/pull/10435