Add support for LoongArch64 #33

Job	Run time
test (x86_64-unknown-linux-gnu, 1.59.0)	2m 38s
test (x86_64-unknown-linux-gnu, nightly)	2m 43s
test (i686-unknown-linux-gnu, 1.59.0)	2m 32s
test (i686-unknown-linux-gnu, nightly)	4m 19s
test (aarch64-unknown-linux-gnu, 1.59.0)	2m 23s
test (aarch64-unknown-linux-gnu, nightly)	5m 9s
test (armv7-unknown-linux-gnueabihf, 1.59.0)	2m 14s
test (armv7-unknown-linux-gnueabihf, nightly)	4m 20s
test (thumbv7neon-unknown-linux-gnueabihf, nightly)	4m 25s
test (x86_64-apple-darwin, 1.59.0)	2m 59s
test (x86_64-apple-darwin, nightly)	5m 34s
test (x86_64-pc-windows-gnu, 1.59.0)	3m 14s
test (x86_64-pc-windows-gnu, nightly)	7m 20s
test (x86_64-pc-windows-msvc, 1.59.0)	3m 32s
test (x86_64-pc-windows-msvc, nightly)	6m 6s
test (riscv64gc-unknown-linux-gnu, 1.59.0)	2m 2s
test (riscv64gc-unknown-linux-gnu, nightly)	4m 6s
test (i686-pc-windows-gnu, nightly)	7m 2s
test (i686-pc-windows-msvc, nightly)	4m 34s
	1h 17m 12s

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