Build

Drop -Bsymbolic from the linker spec #6

Job	Run time
Cross build (aarch64-unknown-linux-musl)	2m 50s
Cross build (x86_64-unknown-linux-gnu)	3m 31s
Cross build (aarch64-unknown-apple-darwin)	1m 6s
Cross build (armv7-unknown-linux-musleabihf)	2m 50s
Cross build (x86_64-unknown-apple-darwin)	1m 9s
Cross build (i386-unknown-freebsd)	3m 13s
Cross build (mips64el-unknown-linux-android)	45s
Cross build (aarch64-unknown-linux-android)	3m 7s
Cross build (armv7-unknown-linux-androideabi21)	3m 6s
Cross build (x86_64-unknown-netbsd)	1m 42s
Cross build (riscv64-unknown-linux-android)	43s
Cross build (x86_64-w64-mingw32)	55s
Cross build (arm-unknown-linux-gnueabi)	2m 39s
Cross build (aarch64-unknown-freebsd)	2m 4s
Cross build (i686-unknown-linux-android21)	2m 47s
Cross build (i386-unknown-linux-musl)	2m 46s
Cross build (i386-unknown-linux-gnu)	3m 20s
Cross build (i686-w64-mingw32)	53s
Cross build (aarch64-w64-mingw32)	1m 1s
Cross build (armv6-unknown-linux-musleabihf)	2m 46s
Cross build (mipsel-unknown-linux-android21)	40s
Cross build (x86_64-unknown-freebsd)	3m 17s
Cross build (x86_64-unknown-linux-musl)	2m 46s
Cross build (x86_64-unknown-linux-android)	2m 59s
Cross build (arm-unknown-linux-gnueabihf)	3m 24s
Cross build (aarch64-unknown-linux-gnu)	3m 18s
Cross build (i386-unknown-netbsdelf)	1m 41s
Cross build (x86_64-unknown-dragonfly)	2m 28s
Create release	8s
	1h 3m 54s

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