/usr/lib/ is in kdepim-dev 4:4.13.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libeventviews.so
/usr/lib/libksieveui.so
/usr/lib/libgrammar.so
/usr/lib/libgrantleethemeeditor.so
/usr/lib/libkcal_resourceblog.so
/usr/lib/libkleopatraclientgui.so
/usr/lib/libkorganizer_core.so
/usr/lib/libkmanagesieve.so
/usr/lib/libkdepimmobileui.so
/usr/lib/libmailimporter.so
/usr/lib/libtemplateparser.so
/usr/lib/libincidenceeditorsngmobile.so
/usr/lib/libksieve.so
/usr/lib/libmessagecore.so
/usr/lib/libkpgp.so
/usr/lib/libknodecommon.so
/usr/lib/libcalendarsupport.so
/usr/lib/libmessageviewer.so
/usr/lib/libkdgantt2.so
/usr/lib/libkleopatraclientcore.so
/usr/lib/libincidenceeditorsng.so
/usr/lib/libkcal_resourceremote.so
/usr/lib/libkleo.so
/usr/lib/libpimactivity.so
/usr/lib/libkdepim.so
/usr/lib/libmailcommon.so
/usr/lib/libpimcommon.so
/usr/lib/libakregatorinterfaces.so
/usr/lib/libmessagelist.so
/usr/lib/libsendlater.so
/usr/lib/libakonadi_next.so
/usr/lib/libmessagecomposer.so
/usr/lib/libcomposereditorng.so
/usr/lib/libkdepimdbusinterfaces.so
/usr/lib/libgrantleetheme.so
/usr/lib/libkorganizer_interfaces.so