/usr/lib/libgstreamermm_get_plugin_defs-0.10.so.2 is in libgstreamermm-0.10-2 0.10.9-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgstreamermm_get_plugin_defs-0.10.so.2.0.1
/usr/lib/libgstreamermm_get_plugin_defs-0.10.so.2.0.1