Make sym_randomdir not a dead symlink. - Add .gitkeep to randomdir in simple_app fixture. - Hopefully, this will fix the 'Package failed to process correctly after upload' error in the override.yml integration test.
Make sym_randomdir not a dead symlink.
- Add .gitkeep to randomdir in simple_app fixture.
- Hopefully, this will fix the 'Package failed to process correctly after upload' error in the override.yml integration test.

[#155981307]

Signed-off-by: Jackson Feeny <c36636f229e2e0887bbecb5e06d5626818aed501@gmail.com>

cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack