Fix "no writable path" found in curli-install.t
Fix "no writable path" found in curli-install.t

This test relied on a bug in rakudo that made it create the repository
directory during completely unrelated actions. When that bug is fixed,
the test would fail due to the non-existing repository directory.

dogbert17/roast,b2gills/roast,dogbert17/roast,skids/roast,dankogai/roast,skids/roast,dankogai/roast,zostay/roast,zostay/roast,bitrauser/roast,b2gills/roast,zostay/roast,b2gills/roast,perl6/roast,dankogai/roast,skids/roast,bitrauser/roast