* Update to version 6.8.
* Drop backports-6.4.1.git-diff: incorporated upstream.
* Add quantum-espresso-devxlib-no-download.patch: Patch to avoid downloading devxlib from the web; we supply it as an additional source instead.
* Add devxlib as an additional source and copy it to dir where quantum-espresso build expects.
* Add openmpi4 as multibuild flavor.
* Drop mvapich2 multibuild flavor, not well supported and builds fail.
* Hack-ish work-arounds to prevent build failures all around.
* Link against scalapack for parallel build flavors.
OBS-URL: https://build.opensuse.org/request/show/932838
OBS-URL: https://build.opensuse.org/package/show/science/quantum-espresso?expand=0&rev=17