[clang-format] Pass return code of git-clang-format by sys.exit()

Fixes #54758

diff --git a/clang/tools/clang-format/git-clang-format b/clang/tools/clang-format/git-clang-format
index 7968c43..1d6f216 100755 (executable)
--- a/clang/tools/clang-format/git-clang-format
+++ b/clang/tools/clang-format/git-clang-format
@@ -628,4 +628,4 @@ def convert_string(bytes_input):
         return str(bytes_input)
 
 if __name__ == '__main__':
-  main()
+  sys.exit(main())