make generate: don't error when find does not find any file  (#9413)
make generate: don't error when find does not find any file  (#9413)


Co-authored-by: Adrien Delorme <cd910f2c814b97a5a5de8374fb0c727053e37934@users.noreply.github.com>
pecigonzalo/packer,ricardclau/packer,mitchellh/packer,rnaveiras/packer,pecigonzalo/packer,ricardclau/packer,rnaveiras/packer,ricardclau/packer,hashicorp/packer,hashicorp/packer,mitchellh/packer,pecigonzalo/packer,mitchellh/packer,hashicorp/packer,ricardclau/packer,mitchellh/packer,ricardclau/packer,rnaveiras/packer,hashicorp/packer,rnaveiras/packer,ricardclau/packer,pecigonzalo/packer,mitchellh/packer,rnaveiras/packer,rnaveiras/packer