Update djvulibre to version 3.5.28 / rev 40 via SR 858983
    
    https://build.opensuse.org/request/show/858983
    by user pgajdos + dimstar_suse
    - Update to version 3.5.28
      * ddjvu: tiff generation improvements
      * djvumake: security checks on INCL chunks
      * all: updated for modern compilers
      * bugs: fixed several crashes on invalid inputs
      * miniexp: fixed escape printout and macrochars
      * djvudigital: can use poppler to find text
      * csepdjvu: handle T comments for page titles
      * bytestream: fixed 2GB limit
      * gexception, gthread: cleanup obsolete code
    - Drop patches incorporated or otherwise fixed upstream:
      * djvulibre-invalid-tiff.patch
      * djvulibre-CVE-2019-15144.patch
      * djvulibre-CVE-2019-15145.patch
      * djvulibre-CVE-2019-18804.patch
      * djvulibre-CVE-2019-15143.patch
      * djvulibre-always-assume-that-cpuid-works-on-x86_64.patch
      * djvulibre-CVE-2019-15142.patch
      * reproducible.patch
    - Only run post(un) scriptlet