Fix: build target wasm32-unknown-emscripten #1367

Job	Run time
macos-aarch64	3m 35s
linux_native_builds (x86_64-unknown-linux-gnu)	4m 23s
macos	6m 51s
linux_native_builds (x86_64-unknown-linux-musl)	4m 4s
minver	17s
rust_stable	1m 21s
rustfmt	8s
tier3 (x86_64-unknown-dragonfly)	58s
tier3 (x86_64-unknown-openbsd)	59s
tier3 (x86_64-unknown-haiku)	57s
redox	39s
cross (arm-unknown-linux-gnueabi)	1m 50s
cross_compiling (aarch64-linux-android)	38s
cross (armv7-unknown-linux-gnueabihf)	1m 52s
cross_compiling (arm-linux-androideabi)	36s
cross (i686-unknown-linux-gnu)	1m 44s
cross_compiling (armv7-linux-androideabi)	38s
cross (i686-unknown-linux-musl)	1m 59s
cross (mips-unknown-linux-gnu)	1m 47s
cross_compiling (i686-linux-android)	35s
cross (mips64-unknown-linux-gnuabi64)	1m 42s
cross_compiling (x86_64-linux-android)	34s
cross (mips64el-unknown-linux-gnuabi64)	1m 50s
cross_compiling (arm-unknown-linux-musleabi)	37s
cross (mipsel-unknown-linux-gnu)	1m 46s
cross_compiling (x86_64-unknown-fuchsia)	29s
cross (powerpc64le-unknown-linux-gnu)	1m 51s
cross_compiling (x86_64-unknown-illumos)	34s
cross_compiling (aarch64-apple-ios, true)	30s
cross_compiling (powerpc64-unknown-linux-gnu)	38s
cross_compiling (s390x-unknown-linux-gnu)	42s
cross_compiling (x86_64-unknown-linux-gnux32)	39s
cross_compiling (x86_64-unknown-netbsd)	33s
	48m 16s

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