Add coverage

tools/telemetry/third_party/coverage/coverage/env.py

Index: tools/telemetry/third_party/coverage/coverage/env.py
diff --git a/tools/telemetry/third_party/coverage/coverage/env.py b/tools/telemetry/third_party/coverage/coverage/env.py
new file mode 100644
index 0000000000000000000000000000000000000000..4cd02c04fa3abdff88b334513f41a6e8fb2fb7d4
--- /dev/null
+++ b/tools/telemetry/third_party/coverage/coverage/env.py
@@ -0,0 +1,32 @@
+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
+
+"""Determine facts about the environment."""
+
+import os
+import sys
+
+# Operating systems.
+WINDOWS = sys.platform == "win32"
+LINUX = sys.platform == "linux2"
+
+# Python implementations.
+PYPY = '__pypy__' in sys.builtin_module_names
+
+# Python versions.
+PYVERSION = sys.version_info
+PY2 = PYVERSION < (3, 0)
+PY3 = PYVERSION >= (3, 0)
+
+# Coverage.py specifics.
+
+# Are we using the C-implemented trace function?
+C_TRACER = os.getenv('COVERAGE_TEST_TRACER', 'c') == 'c'
+
+# Are we coverage-measuring ourselves?
+METACOV = os.getenv('COVERAGE_COVERAGE', '') != ''
+
+# Are we running our test suite?
+# Even when running tests, you can use COVERAGE_TESTING=0 to disable the
+# test-specific behavior like contracts.
+TESTING = os.getenv('COVERAGE_TESTING', '') == 'True'