added .gitignore file
diff --git a/oss-internship-2020/sapi_libarchive/.gitignore b/oss-internship-2020/sapi_libarchive/.gitignore
index 4e7bf47..436efe7 100644
--- a/oss-internship-2020/sapi_libarchive/.gitignore
+++ b/oss-internship-2020/sapi_libarchive/.gitignore
@@ -1,2 +1,3 @@
 build/
+.clang-format
 .cache