Fix typo and remove tmp file in ut (#2789)

.gitignore

@@ -11,10 +11,14 @@ thirdparty/installed
 *.so.tmp
 .DS_Store
 *.iml
+core.*
 extension/spark-doris-connector/.classpath
 extension/spark-doris-connector/target
 fe/log
-custom-env.sh
+custom_env.sh
+ut_dir
+log
+meta
 
 
 #ignore eclipse project file & idea  project file

be/test/olap/byte_buffer_test.cpp

@@ -18,6 +18,7 @@
 #include <gtest/gtest.h>
 #include <sys/mman.h>
 
+#include "boost/filesystem.hpp"
 #include "olap/byte_buffer.h"
 #include "olap/file_helper.h"
 #include "util/logging.h"
@@ -31,6 +32,9 @@ public:
     virtual void SetUp() {
     }
     virtual void TearDown() {
+        if (boost::filesystem::exists(".test_byte_buffer")) {
+            ASSERT_TRUE(boost::filesystem::remove_all(".test_byte_buffer"));
+        }
     }
 };