Add pytest-4.4.0 and its dependencies to venv

This allows us to use a `reason` param in pytest.importorskip().
It also matches the pytest version used in the SDK.

Packages were added via the following command, per the README:
> bin/python_venv -m pip wheel -w pip_packages pytest==4.4.0
The one exception is scandir-1.10.0, which was added via the manylinux
docker method instructed by the README.

TEST=Activate a venv that requires pytest==4.4.0
BUG=chromium:934414

Change-Id: Ic759be3caea7102bd7ec8dbb892563c4eda6abe1
diff --git a/README.md b/README.md
index c025db0..02ae0b6 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@
 
 Install Docker:
 
-    https://g3doc.corp.google.com/cloud/containers/registry/g3doc/glinux-docker/install.md?cl=head
+    https://g3doc.corp.google.com/cloud/containers/g3doc/glinux-docker/install.md?cl=head
 
 Add the manylinux Docker image:
 
diff --git a/pip_packages/atomicwrites-1.3.0-py2.py3-none-any.whl b/pip_packages/atomicwrites-1.3.0-py2.py3-none-any.whl
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diff --git a/pip_packages/configparser-4.0.2-py2.py3-none-any.whl b/pip_packages/configparser-4.0.2-py2.py3-none-any.whl
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diff --git a/pip_packages/pluggy-0.13.1-py2.py3-none-any.whl b/pip_packages/pluggy-0.13.1-py2.py3-none-any.whl
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diff --git a/pip_packages/pytest-4.4.0-py2.py3-none-any.whl b/pip_packages/pytest-4.4.0-py2.py3-none-any.whl
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diff --git a/pip_packages/scandir-1.10.0-cp27-cp27mu-manylinux1_x86_64.whl b/pip_packages/scandir-1.10.0-cp27-cp27mu-manylinux1_x86_64.whl
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diff --git a/pip_packages/setuptools-44.0.0-py2.py3-none-any.whl b/pip_packages/setuptools-44.0.0-py2.py3-none-any.whl
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