Change logs for gfbgraph source package in Groovy

gfbgraph (0.2.3-3) unstable; urgency=medium

  * Update Vcs fields for migration to https://salsa.debian.org/
  * Add Build-Depends-Package to symbols file
  * Add -Wl,-O1 to our LDFLAGS
  * Bump Standards-Version to 4.3.0

 -- Jeremy Bicha <email address hidden>  Mon, 24 Dec 2018 09:31:34 -0500