Add ioctl support for Fuchsia #1738

Job	Run time
macos-aarch64	2m 31s
macos	4m 42s
linux_native_builds (x86_64-unknown-linux-gnu)	2m 53s
linux_native_builds (x86_64-unknown-linux-musl)	2m 52s
rust_stable	1m 33s
rustfmt	11s
minver	13s
solaris (x86_64-pc-solaris)	4m 8s
tier3 (x86_64-unknown-dragonfly)	58s
tier3 (x86_64-unknown-openbsd)	57s
tier3 (x86_64-unknown-haiku)	56s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 10s
tier3 (i686-unknown-hurd-gnu)	1m 0s
redox	0s
cross	0s
cross_compiling	0s
	24m 4s

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