vendor c/common

Also update the e2e pull test to account for the changes when pulling
from the dir transport.  Images pulled via the dir transport are not
tagged anymore; the path is not a reliable source.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/containers/common/pkg/util/util_windows.go

@@ -0,0 +1,12 @@
+// +build windows
+
+package util
+
+import (
+	"github.com/pkg/errors"
+)
+
+// getRuntimeDir returns the runtime directory
+func GetRuntimeDir() (string, error) {
+	return "", errors.New("this function is not implemented for windows")
+}