build: Add CXXFLAGS and LDFLAGS handling for aarch64 macOS · scikit-hep/fastjet@bc648c2

Command ['python', '-m', 'pip', 'wheel', '/Users/runner/work/fastjet/fastjet', '--wheel-dir=/private/var/folders/0g/hj_q_pzx65bbjnslxz9n0src0000gn/T/cibw-run-cinsz6p8/cp312-macosx_arm64/built_wheel', '--no-deps', '-vv'] failed with code 1.

Process completed with exit code 1.

mpfr 4.2.1 is already installed and up-to-date. To reinstall 4.2.1, run: brew reinstall mpfr