data: Provide a local repo configuration

[sunnyflunk]

This allows for the easy (and standardised) set up for using local
packages with solbuild.

So as discussed I see this as 3 simple steps (which I can handle):

1. Repackage solbuild with this profile + tmpfiles.d 'solbuild-local.conf' to create the dir (both in solbuild-config-local-unstable).
2. Create a 'make local' in common to cover a make replacement i.e.
   local:
   sudo solbuild build $(SPECFILE) -p local-unstable-x86_64;
   make abireport
3. Document this is the Help Center
   i.e. to use non repo eopkg's in solbuild, install solbuild-config-local-unstable, put your eopkg's in /var/lib/solbuild/local, run make local instead of make

Think that would cover #4 well

[ikeydoherty]

LGTM - ty!