[Retrace] Add internal tests

Bug: 159425023
Bug: 159420576
Change-Id: I344f412b9ec4817c29a967e52d035a748ff42ebf
diff --git a/.gitignore b/.gitignore
index 0629bac..e184eb8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -141,6 +141,8 @@
 third_party/remapper.tar.gz
 third_party/retrace_benchmark
 third_party/retrace_benchmark.tar.gz
+third_party/retrace_internal
+third_party/retrace_internal.tar.gz
 third_party/rhino-1.7.10
 third_party/rhino-1.7.10.tar.gz
 third_party/rhino-android-1.1.1