macOS

Use obj flag to differentiate RTypedData and RData #672

Job	Run time
make (check, macos-14, --with-gcc=gcc-14)	4m 46s
make (check, macos-14, --with-gmp)	3m 52s
make (check, macos-14, --with-jemalloc --with-opt-dir=$(brew --prefix jemalloc))	4m 27s
make (check, macos-14)	3m 47s
make (test-bundled-gems, macos-14)	10m 35s
make (test-bundler-parallel, macos-14)	18m 47s
make (test-all, --repeat-count=2, macos-14)	10m 58s
make (check, macos-15)	5m 10s
make (check, macos-13)	6m 26s
macOS result	2s
	1h 8m 50s

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