Try to fix `libiconv` linking issue #762

Job	Run time
linux (x86_64-unknown-linux-musl, x86_64-musl)	1m 7s
macos	1m 21s
windows (x64, x86_64-pc-windows-msvc)	2m 4s
linux (i686-unknown-linux-musl, i686-musl)	1m 3s
windows (x86, i686-pc-windows-msvc)	2m 33s
linux (aarch64-unknown-linux-musl, aarch64-musl)	1m 17s
windows (arm64, aarch64-pc-windows-msvc)	3m 53s
linux (armv7-unknown-linux-musleabihf, armv7-musleabihf)	1m 16s
linux (armv7-unknown-linux-musleabi, armv7-musleabi)	1m 7s
Build Docker Image	0s
Build Docker Image (Windows)	0s
Release	0s
	15m 41s

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