Add recipe for tensorflow-hub

On behalf for issues:

- tensorflow/text#644
- conda-forge/tensorflow-feedstock#276 (comment)


A recipe for [tensorflow-hub](https://www.tensorflow.org) is provided

recipes/tensorflow_hub/build.sh

@@ -0,0 +1,4 @@
+set -ex
+python -m pip install --no-deps --ignore-installed ./tensorflow_hub-${PKG_VERSION}-py2.py3-none-any.whl
+# Remove the strict protobuf requirement. Conda will manage it.
+sed -i.bak 's/protobuf>=3.4.0/protobuf/' ${SP_DIR}/tensorflow_hub/__init__.py

recipes/tensorflow_hub/meta.yaml

@@ -0,0 +1,59 @@
+{% set name = "tensorflow-hub" %}
+{% set version = "0.12.0" %}
+
+package:
+  name: {{ name|lower }}
+  version: {{ version }}
+
+source:
+  url: https://pypi.io/packages/py2.py3/t/tensorflow_hub/tensorflow_hub-{{ version }}-py2.py3-none-any.whl
+  sha256: 822fe5f7338c95efcc3a534011c6689e4309ba2459def87194179c4de8a6e1fc
+
+build:
+  number: 0
+  noarch: python
+  entry_points:
+    - make_image_classifier = tensorflow_hub.tools.make_image_classifier.make_image_classifier:run_main
+    - make_nearest_neighbour_index = tensorflow_hub.tools.make_nearest_neighbour_index.make_nearest_neighbour_index:main
+
+requirements:
+  host:
+    - python >=3.7
+    - pip
+  run:
+    - python >=3.7
+    - wheel >=0.26
+    - numpy >=1.12.0
+    - six >=1.10.0
+    - protobuf >=3.9.2
+    - tensorflow >=2.0.0
+    - pillow >=9.0.0
+    - keras-preprocessing >=1.1.2
+    - apache-beam >=2.27.0
+    - python-annoy >=1.17.0
+    - pillow >=5.2.0
+    - scipy >=0.19.1
+
+test:
+  requires:
+    - pip
+  imports:
+    - tensorflow_hub
+    - tensorflow_hub.tools
+    - tensorflow_hub.tools.make_image_classifier
+    - tensorflow_hub.tools.make_nearest_neighbour_index
+
+about:
+  home: https://github.com/tensorflow/hub
+  license: Apache-2.0
+  license_file: LICENSE
+  summary: A library for transfer learning by reusing parts of TensorFlow models.
+  description: |
+    TensorFlow Hub is a library for the publication, discovery, and consumption
+    of reusable parts of machine learning models in TensorFlow.
+  doc_url: https://www.tensorflow.org/hub
+  dev_url: https://github.com/tensorflow/hub
+
+extra:
+  recipe-maintainers:
+    - anselmoo