Fix post scriptlets, kpathsea indexing, dependencies
    - prevent sed from being verbose in install log when uninstalling
    - be sure the old /usr/share/texmf tree is indexed and searched by
    kpathsea (#876710)
    - drop patch to fix build for dvisvgm, it is now applied upstream
    - fix dependencies in texlive and texlive-base subpackages