Fix syscall_info #2083

Job	Run time
macos	1m 4s
macos-aarch64	30s
solaris (x86_64-pc-solaris)	4m 45s
minver	17s
x86_64_linux_native_builds (x86_64-unknown-linux-musl)	35s
x86_64_linux_native_builds (x86_64-unknown-linux-gnu)	3m 16s
aarch64_linux_native_builds (aarch64-unknown-linux-gnu)	3m 28s
aarch64_linux_native_builds (aarch64-unknown-linux-musl)	42s
tier3 (armv7-unknown-linux-uclibceabihf)	42s
tier3 (x86_64-unknown-openbsd)	37s
tier3 (x86_64-unknown-haiku)	38s
rust_stable	1m 34s
rustfmt	10s
tier3 (x86_64-unknown-dragonfly)	35s
redox	0s
cross	0s
cross_compiling	0s
	18m 53s

Provide feedback