/usr/share/pd-gui/plugins-available/ is in pd-iemutils 0.0.20160217-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pd-gui/plugins-available/kiosk-plugin/
/usr/share/pd-gui/plugins-available/kiosk-plugin/LICENSE.txt
/usr/share/pd-gui/plugins-available/kiosk-plugin/README.txt
/usr/share/pd-gui/plugins-available/kiosk-plugin/kiosk-plugin.tcl
/usr/share/pd-gui/plugins-available/kiosk-plugin/kiosk.cfg
/usr/share/pd-gui/plugins-available/patch2svg-plugin/
/usr/share/pd-gui/plugins-available/patch2svg-plugin/LICENSE.txt
/usr/share/pd-gui/plugins-available/patch2svg-plugin/README.md
/usr/share/pd-gui/plugins-available/patch2svg-plugin/autoexport.pd
/usr/share/pd-gui/plugins-available/patch2svg-plugin/patch2svg-plugin.tcl
/usr/share/pd-gui/plugins-available/tclprompt-plugin/
/usr/share/pd-gui/plugins-available/tclprompt-plugin/LICENSE
/usr/share/pd-gui/plugins-available/tclprompt-plugin/README.md
/usr/share/pd-gui/plugins-available/tclprompt-plugin/tclprompt-plugin.tcl