Bump package version to 3.4.0-3

Change-Id: Ia73a770b5c442db232da0286fe173550649c4333
(cherry picked from commit ef983559)

debian/changelog

+loolwsd (3.4.0-3) unstable; urgency=medium
+
+  * see the git log: http://col.la/cool3
+
+ -- Andras Timar <andras.timar@collabora.com>  Fri, 30 Aug 2018 08:30:00 +0200
+
 loolwsd (3.4.0-2) unstable; urgency=medium
 
   * see the git log: http://col.la/cool3

loolwsd.spec.in

@@ -12,7 +12,7 @@ Name:           loolwsd%{name_suffix}
 Name:           loolwsd
 %endif
 Version:        @PACKAGE_VERSION@
-Release:        2%{?dist}
+Release:        3%{?dist}
 %if 0%{?suse_version} == 1110
 Group:          Productivity/Office/Suite
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build