[feature request] Package scripts into RPM for installation

[jsturdy]

As discussed with @evka85, and in cms-gem-daq-project/gemctp7user#41, creating an RPM package for the scripts in this repository that are necessary to install on the CTP7 is the best way forward.
In addition, the bitfile and address table can be packaged in this way, and versioned dependencies with, e.g., ctp7_modules can be enforced

• Should just need a basic Makefile with a make rpm target, and a simple spec template.
• Probably doesn't need to include gembuild, but could be added as a submodule if necessary