Avoid printing a warning if files already exists

Since we copy a lot of the previous session files, in some
cases we shouldn't worry if the file already exists.

Test: unit tests
Bug: 148799303
Change-Id: I8ee7dada83a38712eabbee7effb4d3df75a94422
1 file changed
tree: 133c40f36fbbfc9df120a630b2306d40cf02f428
  1. build/
  2. common/
  3. tools/
  4. OWNERS
  5. PREUPLOAD.cfg
  6. test_defs.sh