Verify if git folder already exists before clone

If a clean-local was used, the next make would fail as it would try
to clone the repositories in already existing folders.
1 file changed
tree: 586d2f67cbcc8d19310ea6e9c684b7ec3352c2d6
  1. examples/
  2. src/
  3. .gitignore
  4. AUTHORS
  5. COPYING
  6. Makefile
  7. README