Use the full path location of supporting scripts.
Use the full path location of supporting scripts.

The `script`/functions.sh file is referenced from within the Rails
sample app when it is generated in the `rspec-rails` repo. The `source`
lines do not properly adjust the file references if the `functions.sh`
script is sourced or run from another location.

rspec/rspec-dev,rspec/rspec-dev,rspec/rspec-dev