Make logger_test work under GDB again

It wasn't cleaning up previous runs all the way and was relying on the
sandbox.  This makes it hard to debug tests.

Change-Id: Id7a691b142a8a38934342bba42816205b7d3bc0a
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/events/logging/logger_test.cc b/aos/events/logging/logger_test.cc
index 5532caf..67d4897 100644
--- a/aos/events/logging/logger_test.cc
+++ b/aos/events/logging/logger_test.cc
@@ -2161,6 +2161,8 @@
 
 // Test that renaming the base, renames the folder.
 TEST_F(MultinodeLoggerTest, LoggerRenameFolder) {
+  util::UnlinkRecursive(tmp_dir_ + "/renamefolder");
+  util::UnlinkRecursive(tmp_dir_ + "/new-good");
   time_converter_.AddMonotonic(
       {monotonic_clock::epoch(),
        monotonic_clock::epoch() + chrono::seconds(1000)});
@@ -2190,6 +2192,7 @@
   time_converter_.AddMonotonic(
       {monotonic_clock::epoch(),
        monotonic_clock::epoch() + chrono::seconds(1000)});
+  util::UnlinkRecursive(tmp_dir_ + "/renamefile");
   logfile_base1_ = tmp_dir_ + "/renamefile/multi_logfile1";
   logfile_base2_ = tmp_dir_ + "/renamefile/multi_logfile2";
   logfiles_ = MakeLogFiles(logfile_base1_, logfile_base2_);