Don't set -fobjc-runtime=gnustep-2.0 as a global flag #193

Job	Run time
windows-2022 Release x64_x86	1m 57s
ubuntu-22.04 Release LLVM-13 libc++	42s
Cross-build for arm-linux-gnueabihf LLVM-13 Release	1m 0s
windows-2022 Release x64	1m 53s
ubuntu-22.04 Release LLVM-14 libc++	28s
Cross-build for aarch64-linux-gnu LLVM-13 Release	55s
windows-2022 Debug x64_x86	1m 17s
ubuntu-22.04 Release LLVM-15 libc++	40s
Cross-build for arm-linux-gnueabihf LLVM-14 Release	1m 35s
windows-2022 Debug x64	2m 7s
ubuntu-22.04 Release LLVM-13 libstdc++	31s
windows-2019 Release x64_x86	1m 6s
Cross-build for aarch64-linux-gnu LLVM-14 Release	1m 0s
ubuntu-22.04 Release LLVM-14 libstdc++	29s
windows-2019 Release x64	2m 4s
Cross-build for arm-linux-gnueabihf LLVM-13 Debug	1m 57s
ubuntu-22.04 Release LLVM-15 libstdc++	26s
windows-2019 Debug x64_x86	2m 18s
Cross-build for aarch64-linux-gnu LLVM-13 Debug	1m 48s
ubuntu-22.04 Debug LLVM-13 libc++	37s
Cross-build for arm-linux-gnueabihf LLVM-14 Debug	2m 9s
windows-2019 Debug x64	2m 13s
ubuntu-22.04 Debug LLVM-14 libc++	36s
Cross-build for aarch64-linux-gnu LLVM-14 Debug	2m 10s
ubuntu-22.04 Debug LLVM-15 libc++	38s
ubuntu-22.04 Debug LLVM-13 libstdc++	29s
ubuntu-22.04 Debug LLVM-14 libstdc++	31s
ubuntu-22.04 Debug LLVM-15 libstdc++	33s
ubuntu-20.04 Release LLVM-10 libc++	33s
ubuntu-20.04 Release LLVM-12 libc++	49s
ubuntu-20.04 Release LLVM-10 libstdc++	31s
ubuntu-20.04 Release LLVM-12 libstdc++	42s
ubuntu-20.04 Debug LLVM-10 libc++	30s
ubuntu-20.04 Debug LLVM-12 libc++	36s
ubuntu-20.04 Debug LLVM-10 libstdc++	25s
ubuntu-20.04 Debug LLVM-12 libstdc++	31s
all-checks	1s
	38m 47s

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