Mark legacy API with OBJC_PUBLIC #192

Job	Run time
Cross-build for arm-linux-gnueabihf LLVM-13 Release	1m 2s
windows-2022 Release x64_x86	2m 26s
ubuntu-22.04 Release LLVM-13 libc++	40s
windows-2022 Release x64	1m 9s
windows-2022 Debug x64_x86	2m 16s
ubuntu-22.04 Release LLVM-14 libc++	33s
windows-2022 Debug x64	2m 37s
Cross-build for aarch64-linux-gnu LLVM-13 Release	1m 6s
ubuntu-22.04 Release LLVM-15 libc++	35s
windows-2019 Release x64_x86	1m 7s
Cross-build for arm-linux-gnueabihf LLVM-14 Release	1m 15s
windows-2019 Release x64	1m 53s
ubuntu-22.04 Release LLVM-13 libstdc++	31s
windows-2019 Debug x64_x86	1m 45s
ubuntu-22.04 Release LLVM-14 libstdc++	41s
Cross-build for aarch64-linux-gnu LLVM-14 Release	1m 5s
ubuntu-22.04 Release LLVM-15 libstdc++	25s
windows-2019 Debug x64	2m 1s
Cross-build for arm-linux-gnueabihf LLVM-13 Debug	2m 7s
ubuntu-22.04 Debug LLVM-13 libc++	52s
Cross-build for aarch64-linux-gnu LLVM-13 Debug	2m 8s
Cross-build for arm-linux-gnueabihf LLVM-14 Debug	2m 12s
ubuntu-22.04 Debug LLVM-14 libc++	58s
Cross-build for aarch64-linux-gnu LLVM-14 Debug	2m 16s
ubuntu-22.04 Debug LLVM-15 libc++	40s
ubuntu-22.04 Debug LLVM-13 libstdc++	33s
ubuntu-22.04 Debug LLVM-14 libstdc++	1m 0s
ubuntu-22.04 Debug LLVM-15 libstdc++	29s
ubuntu-20.04 Release LLVM-10 libc++	48s
ubuntu-20.04 Release LLVM-12 libc++	27s
ubuntu-20.04 Release LLVM-10 libstdc++	28s
ubuntu-20.04 Release LLVM-12 libstdc++	32s
ubuntu-20.04 Debug LLVM-10 libc++	42s
ubuntu-20.04 Debug LLVM-12 libc++	42s
ubuntu-20.04 Debug LLVM-10 libstdc++	29s
ubuntu-20.04 Debug LLVM-12 libstdc++	31s
all-checks	1s
	41m 2s

Provide feedback