Add apple tvos support (#2169) #16

Job	Run time
macos	1m 37s
minver	17s
linux_native_builds (x86_64-unknown-linux-gnu)	2m 8s
rust_stable	1m 14s
linux_native_builds (x86_64-unknown-linux-musl)	1m 51s
rustfmt	16s
tier3 (x86_64-unknown-dragonfly)	54s
tier3 (x86_64-unknown-openbsd)	1m 20s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 34s
tier3 (x86_64-unknown-haiku)	1m 36s
redox	37s
cross (arm-unknown-linux-gnueabi)	7m 1s
cross_compiling (aarch64-linux-android)	50s
cross (armv7-unknown-linux-gnueabihf)	2m 34s
cross_compiling (arm-linux-androideabi)	44s
cross (i686-unknown-linux-gnu)	1m 31s
cross_compiling (armv7-linux-androideabi)	50s
cross (i686-unknown-linux-musl)	2m 28s
cross_compiling (i686-linux-android)	45s
cross (mips-unknown-linux-gnu)	1m 37s
cross_compiling (x86_64-linux-android)	43s
cross (mips64-unknown-linux-gnuabi64)	6m 51s
cross_compiling (arm-unknown-linux-musleabi)	44s
cross (mips64el-unknown-linux-gnuabi64)	1m 34s
cross_compiling (x86_64-unknown-fuchsia)	24s
cross (mipsel-unknown-linux-gnu)	1m 36s
cross_compiling (x86_64-unknown-illumos)	26s
cross (powerpc64le-unknown-linux-gnu)	1m 46s
cross_compiling (aarch64-apple-ios, true)	28s
cross_compiling (powerpc64-unknown-linux-gnu)	34s
cross_compiling (s390x-unknown-linux-gnu)	35s
cross_compiling (x86_64-unknown-linux-gnux32)	47s
cross_compiling (x86_64-unknown-netbsd)	42s
	48m 54s

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