dirac-1.0.2-160000.2.2

- Use %autosetup macro. Allows to eliminate the usage of deprecated
  PatchN.

- Use gcc7 in SLE_12

- Cleanu pwith spec-cleaner
- Switch to upstream tarball instead of repacking
- Update dependencies to match reality
- Explicitely enable configuration switches
- Disable docu building as they are kinda empty unless we would
  add latex and dot

- Add baselibs.conf as Source

- added existing baselibs.conf to fix build

- remove unneeded texlive-latex dependency

- Don't buildrequire valgrind-devel anywhere, it's unused.

- buildrequire pkg-config regardless of build-architecture

- fix license to be in spdx.org format

- add libtool as buildrequire to make the spec file more reliable