Fixes kubernetes/kubeadm#903

The version in the spec file must be hardcoded because the `{filename}`
syntax in the tar command is a substitutaion by bazel which happens before
the spec file does its ownt %{} substitutions. Therefore, if we use %{version}
bazel will not be able to find {crictl-v%{version}-...} in its list of
files so no substituation will take place and the file will not be found.
Signed-off-by: Chuck Ha <ha.chuck@gmail.com>