vendor/golang.org/x/text/unicode: Add bidi and norm

Generated with:

  $ go mod vendor

using:

  $ go version
  go version go1.14.4 linux/amd64

addressing [1]:

  Building github.com/openshift/cluster-version-operator (v1.0.0-302-g13e97af4-dirty)
  # golang.org/x/text/unicode/norm
  vendor/golang.org/x/text/unicode/norm/composition.go:466:2: undefined: recompMapOnce
  ...

I'd guessed these slipped through in 2021b86 (Bug 1855577: Updating
the golang.org/x/text version to v0.3.3, 2020-07-15, #408).

  $ go1.13.5 mod vendor

pulls them in too, so I'm not entirely clear on how they slipped
through.  But they seem to be fatal for 1.14 builds and non-fatal for
1.13 builds.

[1]: https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_cluster-version-operator/414/pull-ci-openshift-cluster-version-operator-master-images/1286049697189859328

Author: wking