MapFlags netbsd/freebsd constant additions. #284

Job	Run time
macos	2m 7s
rust_stable	1m 1s
linux_native_builds (x86_64-unknown-linux-gnu)	1m 17s
minver	12s
linux_native_builds (x86_64-unknown-linux-musl)	1m 16s
tier3 (x86_64-unknown-dragonfly)	55s
rustfmt	18s
tier3 (x86_64-unknown-openbsd)	53s
tier3 (x86_64-unknown-haiku)	58s
redox	36s
cross (arm-unknown-linux-gnueabi)	1m 44s
cross_compiling (aarch64-linux-android)	30s
cross (armv7-unknown-linux-gnueabihf)	1m 55s
cross_compiling (arm-linux-androideabi)	32s
cross (i686-unknown-linux-gnu)	1m 35s
cross_compiling (armv7-linux-androideabi)	36s
cross (i686-unknown-linux-musl)	1m 43s
cross_compiling (i686-linux-android)	31s
cross (mips-unknown-linux-gnu)	1m 35s
cross_compiling (x86_64-linux-android)	36s
cross_compiling (arm-unknown-linux-musleabi)	36s
cross_compiling (x86_64-unknown-fuchsia)	24s
cross (mips64-unknown-linux-gnuabi64)	1m 45s
cross_compiling (x86_64-unknown-illumos)	26s
cross (mips64el-unknown-linux-gnuabi64)	1m 42s
cross_compiling (aarch64-apple-ios, true)	30s
cross (mipsel-unknown-linux-gnu)	1m 35s
cross_compiling (powerpc64-unknown-linux-gnu)	36s
cross (powerpc64le-unknown-linux-gnu)	1m 52s
cross_compiling (s390x-unknown-linux-gnu)	35s
cross_compiling (x86_64-unknown-linux-gnux32)	35s
cross_compiling (x86_64-unknown-netbsd)	25s
	31m 51s

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