[pkg] do not include all files in spec
our spec files conflict with filesystem package in centos7: we set permission
755 for /usr/bin and /usr/lib whereas filesystem set it to 555.
So to be compatible with both centos7 and others we simply ignore theses
directories.
TODO list for the rql package
=============================
* retirer les restrictions e_type = [A-Z][a-z_]*
r_type = [a-z_]*
* detecter les erreurs ASAP pour éviter stcheck
* tests unitaires pour sqlgen
* revoir tutoriel
* specification 1.0