missing crypto import #2085

Job	Run time
driver (image=moby/buildkit:latest)	10s
debug	21s
driver (image=moby/buildkit:master network=host )	7s
error	15s
multi	10s
main	21s
use (true)	6s
main (latest)	9s
use (false)	9s
build-ref (master)	25s
main (v0.4.1)	12s
config	16s
build-ref (refs/tags/v0.5.1)	8s
main (lab:latest)	7s
build-ref (refs/pull/731/head)	8s
config-inline	13s
main (lab:v0.11.2-desktop.2)	12s
docker-driver	7s
build-ref (cb185f095fd3d9444e0aa605d3789e9e05f2a1e7)	10s
standalone-cmd	8s
endpoint	44s
standalone-install-error	8s
standalone-action	13s
with-qemu (v0.9.1, all)	7s
with-qemu (v0.9.1, arm64,riscv64,arm)	17s
with-qemu (all)	8s
with-qemu (arm64,riscv64,arm)	14s
append	16s
cleanup (true)	5s
docker-context	6s
cleanup (false)	4s
install	7s
k3s (v0.11.0)	53s
k3s (v0.10.5)	1m 6s
platforms	12s
cache-binary (true)	6s
cache-binary (false)	5s
	8m 45s

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