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Add exitspec section and add new -x parameters #728

Job	Run time
macos-x86_64	51s
linux-x86_64	1m 6s
linux-x86_64-autotools	1m 39s
linux (i386, i686, i686-linux-gnu, i386-linux-gnu)	1m 18s
linux (armhf, armhf, arm-linux-gnueabihf, arm-linux-gnueabihf)	1m 15s
macos-x86_64_autotools	52s
linux (arm64, aarch64, aarch64-linux-gnu, aarch64-linux-gnu)	1m 21s
mingw (mingw64, x86_64)	2m 5s
msvc (x86, Win32)	2m 7s
mingw (ucrt64, ucrt-x86_64)	2m 8s
msvc (x64, x64)	2m 4s
mingw (clang64, clang-x86_64)	2m 6s
msvc (arm64, ARM64)	2m 13s
	21m 5s

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