RFR: 8299693: Change to Xcode12.4+1.1 devkit for building on macOS at Oracle

[Mikael Vidstedt]

Bump the devkit version used when building on macOS at Oracle to work around an issue when building on Ventura.

-------------

Commit messages:
 - 8299693: Change to Xcode12.4+1.1 devkit for building on macOS at Oracle

Changes: https://git.openjdk.org/jdk/pull/11869/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11869&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299693
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11869.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11869/head:pull/11869

PR: https://git.openjdk.org/jdk/pull/11869