Add apple tvos support #14

Job	Run time
minver	18s
rust_stable	57s
macos	1m 40s
linux_native_builds (x86_64-unknown-linux-gnu)	1m 9s
linux_native_builds (x86_64-unknown-linux-musl)	59s
rustfmt	7s
tier3 (x86_64-unknown-dragonfly)	56s
tier3 (x86_64-unknown-openbsd)	51s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 49s
tier3 (x86_64-unknown-haiku)	1m 12s
redox	33s
cross (arm-unknown-linux-gnueabi)	2m 11s
cross_compiling (aarch64-linux-android)	43s
cross (armv7-unknown-linux-gnueabihf)	1m 36s
cross_compiling (arm-linux-androideabi)	57s
cross (i686-unknown-linux-gnu)	1m 34s
cross_compiling (armv7-linux-androideabi)	30s
cross_compiling (i686-linux-android)	45s
cross (i686-unknown-linux-musl)	2m 22s
cross_compiling (x86_64-linux-android)	33s
cross (mips-unknown-linux-gnu)	2m 15s
cross_compiling (arm-unknown-linux-musleabi)	47s
cross (mips64-unknown-linux-gnuabi64)	2m 12s
cross_compiling (x86_64-unknown-fuchsia)	32s
cross (mips64el-unknown-linux-gnuabi64)	2m 42s
cross_compiling (x86_64-unknown-illumos)	24s
cross_compiling (aarch64-apple-ios, true)	40s
cross (mipsel-unknown-linux-gnu)	1m 32s
cross_compiling (powerpc64-unknown-linux-gnu)	34s
cross (powerpc64le-unknown-linux-gnu)	2m 44s
cross_compiling (s390x-unknown-linux-gnu)	56s
cross_compiling (x86_64-unknown-linux-gnux32)	53s
cross_compiling (x86_64-unknown-netbsd)	25s
	38m 18s

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