Update to newest imgcrypt, aufs and zfs

Older versions transitively dragged in k8s.io/kubernetes, the newer
versions do not.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/go.mozilla.org/pkcs7/Makefile

@@ -0,0 +1,20 @@
+all: vet staticcheck test
+
+test:
+	go test -covermode=count -coverprofile=coverage.out .
+
+showcoverage: test
+	go tool cover -html=coverage.out
+
+vet:
+	go vet .
+
+lint:
+	golint .
+
+staticcheck:
+	staticcheck .
+
+gettools:
+	go get -u honnef.co/go/tools/...
+	go get -u golang.org/x/lint/golint