binfmt: match loong64 arch name to containerd known arches #583

Job	Run time
prepare (mainline)	23s
prepare (buildkit)	7s
prepare (desktop)	31s
validate (./hack/lint)	27s
e2e (mainline, pip-youtube-dl, linux/arm/v7)	1m 22s
validate (./hack/validate-vendor)	14s
e2e (mainline, webpack, linux/arm/v7)	2m 0s
test (mainline)	3m 6s
validate (./hack/install-and-test)	46s
e2e (desktop, pip-youtube-dl, linux/arm/v7)	1m 24s
test (buildkit)	28s
e2e (desktop, webpack, linux/arm/v7)	1m 58s
test (desktop)	9s
e2e (mainline, ejabberd, linux/arm64)	13m 42s
e2e (desktop, tini, linux/arm64, --rm)	42s
e2e (desktop, postgis, linux/arm64, -d --name postgis, postgis, UTC [1] LOG: database system is ...	39s
build (mainline)	1m 37s
build (buildkit)	12s
build (desktop)	1m 37s
	31m 24s

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