[jdk8u-dev] RFR: 8324185: [8u] Accept Xcode 12+ builds on macOS

[Sergey Bylokhov]

I would like to update the build logic for macOS so it will accept the XCode 14 and 15. It could be done in a few ways:

 - Add XCode 13, 14 and 15 to the list of supported versions, like [this](https://github.com/openjdk/jdk8u-dev/pull/422/commits/d2d157ff4dd04cb108e036282643b21ac132016c)
 - Accept all XCode 9+ versions, like [this](https://github.com/openjdk/jdk8u-dev/pull/422/commits/d1d5e2d214135084e50bc5aba839afab98cf2de7).
 - Delete the "fail fast" code path. So if the xcode and command-line tools are there then build it, like [this](https://github.com/openjdk/jdk8u-dev/pull/422/commits/d28f6cdbc2bd6cb6bfefc84837a6c7c76c287572). 

I think we can safely delete this check, so this PR implements it.

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Commit messages:
 - Drop "Fail-fast" code path
 - Accept XCode 9+
 - Add Xcode 13, 14 and 15

Changes: https://git.openjdk.org/jdk8u-dev/pull/422/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=422&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324185
  Stats: 15 lines in 2 files changed: 0 ins; 14 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/422.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/422/head:pull/422

PR: https://git.openjdk.org/jdk8u-dev/pull/422