Makefile - fix RPM name to include distro name and version
Makefile - fix RPM name to include distro name and version

We're going to use Vagrant VMs to build RPMs for a given distro and
version. It's important to have the OS name and number in the filename
of the RPM, and for some reason fpm can't do this for me.

asimihsan/vocalsalad,asimihsan/vocalsalad