The spec-build.sh was necessary for a proper build, but it is not
correct to depend on external scripts to generate the correct
RPM_BUILD_ROOT files. Now everything is contained in the spec file. The
spec-build.sh can be used in the future to automate the process of
copying sources to the specified directory and signing, but not
modifying the sources contents on a per file basis.
For: https://github.com/ben-grande/qusal/issues/59
