Run gear daemon from /usr/bin so it can startup in local vagrant on boot

When doing local vagrant dev, the gear daemon was not starting on boot even though it was enabled.
After further debug, it was realized that we cannot have a service that starts on boot that is located in a local synced_folder from vagrant.
The gear contrib/build command moves binaries into /usr/bin so we will use that instead in our service file.
This fixes the issue now with geard not running across restarts in local vagrant env.