[Catapult] Update .gitignore to point to new locations in common/

This CL updates .gitignore to catapult_base's move to common/ into account.

BUG=catapult:catapult-project#2738

Review-Url: https://codereview.chromium.org/2292403002

Author: eakuefner

.gitignore

@@ -19,8 +19,11 @@ perf_insights/perf_insights/download_traces.py
 # telemetry's binary dependency download folder.
 /telemetry/telemetry/internal/bin/
 
-# catapult_base's binary dependency download folder.
-/catapult_base/catapult_base/bin/
+# common/py_utils's binary dependency download folder.
+/common/py_utils/py_utils/bin/
 
-# catapult_base's npm installation folder.
-/catapult_base/catapult_base/node_modules/
+# node_runner's binary dependency download folder.
+/common/node_runner/node_runner/bin/
+
+# node_runner's npm installation folder.
+/common/node_runner/node_runner/node_modules/