- Removes potential for Vivado address decoding errors

    - Fixes regression with gcc-8.2.1-6 in Fedora 29 due to VLA
    - Easier to understand the code as well...

Automatically build release packages for common linux distributions

See merge request !28

* do not allocate max number of ports on all ILAs
* group interfaces by clock source
* make argument compatible to plugin convention

    - Newer board file isn't available on Vivado 2017.4

Fixes #173

Resolve "`corestats` don't work with alternative `coreDir`"

See merge request !27