Bug 1737741 - Ignore pytest artifacts in VCS. r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D129464

.gitignore

@@ -160,6 +160,9 @@ testing/talos/talos/tests/devtools/damp.manifest.develop
 tps.log
 tps_result.json
 
+# Unit test
+.pytest_cache/
+
 # Ignore files created when running a reftest.
 lextab.py
 

.hgignore

@@ -184,6 +184,9 @@ _OPT\.OBJ/
 # Ignore toolchains.json created by tooltool.
 ^toolchains\.json
 
+# Unit test
+\.pytest_cache/
+
 # Ignore files created when running a reftest.
 ^lextab.py$