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Fix MacOSX10.9.sdk c++ headers #127

Job	Run time
windows (x86_64)	3m 0s
macos (aarch64, 11, MacOSX11.0.sdk)	1m 3s
macos (x86_64, 10.8, MacOSX10.9.sdk)	30s
windows (aarch64)	3m 11s
ubuntu (riscv64, g++-riscv64-linux-gnu)	39s
ubuntu (x86, g++-multilib)	36s
ubuntu (mingw64, g++-mingw-w64-x86-64)	36s
ubuntu (aarch64, g++-aarch64-linux-gnu)	40s
ubuntu (mingw32, g++-mingw-w64-i686)	48s
ubuntu (mingwaarch64, clang)	55s
ubuntu (x86_64, g++-)	2m 16s
ubuntu (armhf, g++-arm-linux-gnueabihf)	46s
ubuntu (ppc64, g++-powerpc64le-linux-gnu)	40s
	15m 40s

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