Import Debian changes 2.5.2-1

geoclue-2.0 (2.5.2-1) unstable; urgency=medium

  * [da1f3cfb] New upstream version 2.5.2
  * [e6718a56] debian/control: Bump glib dependency to 2.44.0
  * [768c8549] debian/control: Bump Standards-Version to 4.3.0 (no further
    changes)
  * [6c170f04] debian/libgeoclue-2-0.symbols: Add newly exported symbols