This update for pidgin fixes the following issues:

Feature update:
- Update to GNOME 3.20.2 (fate#318572).

Security issues fixed:
- CVE-2017-2640: Fix an out of bounds memory read in purple_markup_unescape_entity. (boo#1028835)
- CVE-2014-3698: remote information leak via crafted XMPP message (boo#902408).
- CVE-2014-3696: denial of service parsing Groupwise server message (boo#902410).
- CVE-2014-3695: crash in MXit protocol plug-in (boo#902409).

Bugfixes
- Correctly remove *.so files for plugins (fixes devel-file-in-non-devel-package).
- Remove generation of a plugin list to package, simply add it all in %files with exclusions.
- Build with GStreamer 1.x on SLE 12 SP2.
- Fix SASL EXTERNAL fingerprint authentication (boo#1009974).
- Use ALSA as default for avoiding broken volume control of pa sink (boo#886670).