Change logs for sonic-visualiser source package in Hirsute

sonic-visualiser (4.2-1) unstable; urgency=medium

  * New upstream version 4.2
  * Appending hardening CPPFLAGS to CXXFLAGS
    * Include buildflags.mk
  * Remove redundant file-stanzas from d/copyright
    * Regenerate d/copyright_hints

 -- IOhannes m zmölnig (Debian/GNU) <email address hidden>  Mon, 17 Aug 2020 22:42:37 +0200