[Telemetry] Add pyfakefs to telemetry/third_party

tools/telemetry/third_party/pyfakefs/README.chromium

Index: tools/telemetry/third_party/pyfakefs/README.chromium
diff --git a/tools/telemetry/third_party/pyfakefs/README.chromium b/tools/telemetry/third_party/pyfakefs/README.chromium
new file mode 100644
index 0000000000000000000000000000000000000000..8b3f0d5f1c755803fe813a88d7ebe5d3d278f871
--- /dev/null
+++ b/tools/telemetry/third_party/pyfakefs/README.chromium
@@ -0,0 +1,17 @@
+Name: pyfakefs
+Short Name: pyfakefs
+URL: https://github.com/jmcgeheeiv/pyfakefs
+Version: a73695b8b173b58ad208db79c5aeaa9ae2693a3c (commit hash)
+License: Apache License 2.0
+License File: pyfakefs/COPYING
+Security Critical: no
+
+Local modification: create a pyfakefs as a project folder & move pyfakefs to
+pyfakefs/pyfakefs since we don't want the project folder to be a module.
+Add license header to pyfakefs/setup.py
+
+Description:
+pyfakefs implements a fake file system that mocks the Python file system
+modules. Using pyfakefs, your tests operate on a fake file system in memory
+without touching the real disk. The software under test requires no modification
+to work with pyfakefs.